diff --git a/backend/alembic/versions/20261016_a7d3e5f20c18_trading_per_symbol_engine.py b/backend/alembic/versions/20261016_a7d3e5f20c18_trading_per_symbol_engine.py
new file mode 100644
index 0000000..a751577
--- /dev/null
+++ b/backend/alembic/versions/20261016_a7d3e5f20c18_trading_per_symbol_engine.py
@@ -0,0 +1,41 @@
+"""trading per symbol engine
+
+Revision ID: a7d3e5f20c18
+Revises: f2a6c8d91b47
+Create Date: 2026-10-16 15:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'a7d3e5f20c18'
+down_revision: Union[str, Sequence[str], None] = 'f2a6c8d91b47'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # 用户决定启停和交易资金按币种分开（2026-10-16）：原账户资金复制给每个币，全部停止
+    op.add_column('trading_symbols', sa.Column('running', sa.Boolean(), nullable=False, server_default=sa.false()))
+    op.add_column('trading_symbols', sa.Column('running_changed_at', sa.DateTime(timezone=True), nullable=True))
+    op.add_column('trading_symbols', sa.Column('capital_usdt', sa.Numeric(), nullable=True))
+    op.execute("UPDATE trading_symbols SET capital_usdt = (SELECT capital_usdt FROM trading_account WHERE id = 1)")
+    op.drop_column('trading_account', 'running')
+    op.drop_column('trading_account', 'running_changed_at')
+    op.drop_column('trading_account', 'capital_usdt')
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.add_column('trading_account', sa.Column('capital_usdt', sa.Numeric(), nullable=True))
+    op.add_column('trading_account', sa.Column('running_changed_at', sa.DateTime(timezone=True), nullable=True))
+    op.add_column('trading_account', sa.Column('running', sa.Boolean(), nullable=False, server_default=sa.false()))
+    op.execute("UPDATE trading_account SET capital_usdt = (SELECT max(capital_usdt) FROM trading_symbols)")
+    op.drop_column('trading_symbols', 'capital_usdt')
+    op.drop_column('trading_symbols', 'running_changed_at')
+    op.drop_column('trading_symbols', 'running')
diff --git a/backend/src/alphapulse/api/settings.py b/backend/src/alphapulse/api/settings.py
index eeaa1ac..8ff84c7 100644
--- a/backend/src/alphapulse/api/settings.py
+++ b/backend/src/alphapulse/api/settings.py
@@ -6,7 +6,7 @@ from typing import Annotated, Literal
 
 from fastapi import APIRouter, Depends, HTTPException, status
 from pydantic import BaseModel, Field, HttpUrl, StringConstraints
-from sqlalchemy import select, update
+from sqlalchemy import func, select, update
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -14,7 +14,7 @@ from alphapulse.ai import llm
 from alphapulse.core.auth import require_admin
 from alphapulse.core.crypto import decrypt, encrypt
 from alphapulse.core.db import get_session
-from alphapulse.models import AiProvider, TradingAccount
+from alphapulse.models import AiProvider, TradingAccount, TradingSymbol
 from alphapulse.trading.client import DemoClient, ExchangeError
 
 router = APIRouter(prefix="/api/settings", tags=["settings"], dependencies=[Depends(require_admin)])
@@ -186,25 +186,29 @@ class ExchangeTestResult(BaseModel):
     error: str | None = None
 
 
-def exchange_out(account: TradingAccount | None) -> ExchangeOut:
+async def any_running(session: AsyncSession) -> bool:
+    return bool(await session.scalar(select(func.count()).where(TradingSymbol.running)))
+
+
+async def exchange_out(session: AsyncSession, account: TradingAccount | None) -> ExchangeOut:
     if account is None:
         return ExchangeOut(configured=False, api_key_hint=None, running=False, updated_at=None)
     return ExchangeOut(
         configured=account.api_key_encrypted is not None, api_key_hint=account.api_key_hint,
-        running=account.running, updated_at=account.updated_at,
+        running=await any_running(session), updated_at=account.updated_at,
     )
 
 
 async def editable_account(session: AsyncSession) -> TradingAccount:
     account = await session.get(TradingAccount, 1)
-    if account is not None and account.running:
-        raise HTTPException(status.HTTP_409_CONFLICT, "模拟盘正在交易，请先停止再修改 key")
+    if await any_running(session):
+        raise HTTPException(status.HTTP_409_CONFLICT, "有币种正在交易，请先全部停止再修改 key")
     return account or TradingAccount(id=1)
 
 
 @router.get("/exchange")
 async def get_exchange(session: Annotated[AsyncSession, Depends(get_session)]) -> ExchangeOut:
-    return exchange_out(await session.get(TradingAccount, 1))
+    return await exchange_out(session, await session.get(TradingAccount, 1))
 
 
 @router.put("/exchange")
@@ -216,7 +220,7 @@ async def put_exchange(body: ExchangeIn, session: Annotated[AsyncSession, Depend
     session.add(account)
     await session.commit()
     await session.refresh(account)
-    return exchange_out(account)
+    return await exchange_out(session, account)
 
 
 @router.delete("/exchange")
@@ -226,7 +230,7 @@ async def delete_exchange(session: Annotated[AsyncSession, Depends(get_session)]
     session.add(account)
     await session.commit()
     await session.refresh(account)
-    return exchange_out(account)
+    return await exchange_out(session, account)
 
 
 @router.post("/exchange/test")
diff --git a/backend/src/alphapulse/api/trading.py b/backend/src/alphapulse/api/trading.py
index 490ef3b..e6ef709 100644
--- a/backend/src/alphapulse/api/trading.py
+++ b/backend/src/alphapulse/api/trading.py
@@ -45,11 +45,6 @@ class TodayUsage(BaseModel):
 
 class StatusOut(BaseModel):
     configured: bool
-    running: bool
-    running_changed_at: datetime | None
-    capital_usdt: Decimal | None
-    # 实际用于仓位计算的资金：min(交易资金, 账户权益)；没有快照时无法计算
-    effective_capital: Decimal | None
     provider_id: int | None
     reasoning_effort: str | None
     # trader 进程的心跳快照；进程离线时为空
@@ -58,7 +53,6 @@ class StatusOut(BaseModel):
 
 
 class ConfigIn(BaseModel):
-    capital_usdt: Annotated[Decimal, Field(gt=0, decimal_places=2)] | None = None
     provider_id: int | None = None
     reasoning_effort: llm.Effort | None = None
 
@@ -73,12 +67,21 @@ class SymbolOut(BaseModel):
     added_at: datetime
     analysis_requested_at: datetime | None
     analyzing: bool
+    running: bool
+    running_changed_at: datetime | None
+    capital_usdt: Decimal | None
+    # 实际用于仓位计算的资金：min(交易资金, 账户权益)；没有快照时无法计算
+    effective_capital: Decimal | None
     # 当前计划：pending / open / closing，没有计划为空
     plan_id: int | None
     plan_status: str | None
     close_deadline: datetime | None
 
 
+class SymbolConfigIn(BaseModel):
+    capital_usdt: Annotated[Decimal, Field(gt=0, decimal_places=2)] | None
+
+
 class SymbolIn(BaseModel):
     symbol: str
 
@@ -177,7 +180,7 @@ class PositionHistoryPage(BaseModel):
 
 
 async def get_account(session: AsyncSession) -> TradingAccount:
-    return await session.get(TradingAccount, 1) or TradingAccount(id=1, running=False)
+    return await session.get(TradingAccount, 1) or TradingAccount(id=1)
 
 
 @router.get("/status")
@@ -191,64 +194,19 @@ async def get_status(session: Annotated[AsyncSession, Depends(get_session)]) ->
             func.coalesce(func.sum(TradingAnalysis.usage["output_tokens"].as_integer()), 0),
         ).where(TradingAnalysis.started_at >= today)
     )).one()
-    snapshot = await read_snapshot()
-    equity = snapshot and snapshot["account"] and Decimal(snapshot["account"]["margin_balance"])
     return StatusOut(
-        configured=account.api_key_encrypted is not None, running=account.running,
-        running_changed_at=account.running_changed_at, capital_usdt=account.capital_usdt,
-        effective_capital=min(account.capital_usdt, equity) if account.capital_usdt and equity else None,
-        provider_id=account.provider_id, reasoning_effort=account.reasoning_effort, snapshot=snapshot,
+        configured=account.api_key_encrypted is not None, provider_id=account.provider_id, reasoning_effort=account.reasoning_effort,
+        snapshot=await read_snapshot(),
         today=TodayUsage(analyses=count, limit=DAILY_ANALYSIS_LIMIT, input_tokens=input_tokens, output_tokens=output_tokens),
     )
 
 
-async def set_running(session: AsyncSession, running: bool) -> StatusOut:
-    account = await get_account(session)
-    if running and account.api_key_encrypted is None:
-        raise HTTPException(status.HTTP_400_BAD_REQUEST, "还没有填写模拟盘 key，请先到环境变量页填写")
-    if running and account.capital_usdt is None:
-        raise HTTPException(status.HTTP_400_BAD_REQUEST, "还没有设置交易资金")
-    if account.running != running:
-        account.running = running
-        account.running_changed_at = datetime.now(LOCAL_TZ)
-        session.add(account)
-        session.add(TradingEvent(
-            kind="started" if running else "stopped",
-            message="开始行情交易" if running else "停止行情交易：不再分析，撤销未成交的入场单；已有持仓的止损、止盈等程序规则继续执行",
-        ))
-        await session.commit()
-    return await get_status(session)
-
-
-@router.post("/start")
-async def start(session: Annotated[AsyncSession, Depends(get_session)]) -> StatusOut:
-    return await set_running(session, True)
-
-
-@router.post("/stop")
-async def stop(session: Annotated[AsyncSession, Depends(get_session)]) -> StatusOut:
-    return await set_running(session, False)
-
-
 @router.patch("/config")
 async def patch_config(body: ConfigIn, session: Annotated[AsyncSession, Depends(get_session)]) -> StatusOut:
     account = await get_account(session)
     fields = body.model_dump(exclude_unset=True)
     if fields.get("provider_id") is not None and await session.get(AiProvider, fields["provider_id"]) is None:
         raise HTTPException(status.HTTP_404_NOT_FOUND, "模型配置不存在")
-    if "capital_usdt" in fields:
-        capital = fields["capital_usdt"]
-        if capital is None and account.running:
-            raise HTTPException(status.HTTP_409_CONFLICT, "交易中不能清空交易资金")
-        snapshot = await read_snapshot()
-        equity = snapshot and snapshot["account"] and Decimal(snapshot["account"]["margin_balance"])
-        if capital is not None and equity and capital > equity:
-            raise HTTPException(status.HTTP_400_BAD_REQUEST, f"交易资金不能超过账户权益 {equity:.2f} USDT")
-        if capital != account.capital_usdt:
-            session.add(TradingEvent(
-                kind="capital_changed",
-                message=f"交易资金设为 {capital} USDT" if capital is not None else "清空交易资金",
-            ))
     for key, value in fields.items():
         setattr(account, key, value)
     session.add(account)
@@ -284,9 +242,71 @@ async def list_symbol_options() -> list[SymbolOption]:
     return [SymbolOption.model_validate(o) for o in await symbol_options()]
 
 
+async def current_equity() -> Decimal | None:
+    """账户权益，取自 trader 的快照；进程离线或未同步到币安时为空"""
+    snapshot = await read_snapshot()
+    return Decimal(snapshot["account"]["margin_balance"]) if snapshot and snapshot["account"] else None
+
+
+async def get_symbol(session: AsyncSession, symbol: str) -> TradingSymbol:
+    s = await session.get(TradingSymbol, symbol)
+    if s is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, f"{symbol} 不在交易列表中")
+    return s
+
+
+async def set_running(session: AsyncSession, s: TradingSymbol, running: bool) -> None:
+    if running and (await get_account(session)).api_key_encrypted is None:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST, "还没有填写模拟盘 key，请先到环境变量页填写")
+    if running and s.capital_usdt is None:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST, f"{s.symbol} 还没有设置交易资金")
+    if s.running != running:
+        s.running = running
+        s.running_changed_at = datetime.now(LOCAL_TZ)
+        session.add(TradingEvent(
+            symbol=s.symbol, kind="started" if running else "stopped",
+            message="开始行情交易" if running else "停止行情交易：不再分析，撤销未成交的入场单；已有持仓的止损、止盈等程序规则继续执行",
+        ))
+        await session.commit()
+
+
+@router.post("/symbols/{symbol}/start")
+async def start(symbol: str, session: Annotated[AsyncSession, Depends(get_session)]) -> None:
+    await set_running(session, await get_symbol(session, symbol), True)
+
+
+@router.post("/symbols/{symbol}/stop")
+async def stop(symbol: str, session: Annotated[AsyncSession, Depends(get_session)]) -> None:
+    await set_running(session, await get_symbol(session, symbol), False)
+
+
+@router.patch("/symbols/{symbol}")
+async def patch_symbol(symbol: str, body: SymbolConfigIn, session: Annotated[AsyncSession, Depends(get_session)]) -> None:
+    """设置该币的交易资金：各币合计不超过账户权益（取不到权益时不校验）"""
+    s = await get_symbol(session, symbol)
+    capital = body.capital_usdt
+    if capital == s.capital_usdt:
+        return
+    if capital is None and s.running:
+        raise HTTPException(status.HTTP_409_CONFLICT, "交易中不能清空交易资金")
+    equity = await current_equity()
+    if capital is not None and equity:
+        others = await session.scalar(
+            select(func.coalesce(func.sum(TradingSymbol.capital_usdt), 0)).where(TradingSymbol.symbol != symbol)
+        )
+        if capital + others > equity:
+            raise HTTPException(status.HTTP_400_BAD_REQUEST,
+                                f"各币交易资金合计不能超过账户权益 {equity:.2f} USDT（其他币已分配 {others:.2f}，最多还能设 {max(equity - others, 0):.2f}）")
+    s.capital_usdt = capital
+    session.add(TradingEvent(symbol=symbol, kind="capital_changed",
+                             message=f"交易资金设为 {capital} USDT" if capital is not None else "清空交易资金"))
+    await session.commit()
+
+
 @router.get("/symbols")
 async def list_symbols(session: Annotated[AsyncSession, Depends(get_session)]) -> list[SymbolOut]:
     symbols = (await session.scalars(select(TradingSymbol).order_by(TradingSymbol.added_at))).all()
+    equity = await current_equity()
     analyzing = set((await session.scalars(select(TradingAnalysis.symbol).where(TradingAnalysis.status == "running"))).all())
     plans = {p.symbol: p for p in await session.scalars(
         select(TradingAnalysis).where(TradingAnalysis.plan_status.in_(LIVE_PLAN_STATUSES)).order_by(TradingAnalysis.id)
@@ -294,7 +314,9 @@ async def list_symbols(session: Annotated[AsyncSession, Depends(get_session)]) -
     return [
         SymbolOut(
             symbol=s.symbol, added_at=s.added_at, analysis_requested_at=s.analysis_requested_at,
-            analyzing=s.symbol in analyzing, plan_id=plans[s.symbol].id if s.symbol in plans else None,
+            analyzing=s.symbol in analyzing, running=s.running, running_changed_at=s.running_changed_at, capital_usdt=s.capital_usdt,
+            effective_capital=min(s.capital_usdt, equity) if s.capital_usdt and equity else None,
+            plan_id=plans[s.symbol].id if s.symbol in plans else None,
             plan_status=plans[s.symbol].plan_status if s.symbol in plans else None,
             close_deadline=plans[s.symbol].close_deadline if s.symbol in plans else None,
         )
@@ -354,14 +376,13 @@ async def delete_symbol(symbol: str, session: Annotated[AsyncSession, Depends(ge
 
 @router.post("/symbols/{symbol}/manual/{action}", status_code=status.HTTP_202_ACCEPTED)
 async def manual_action(symbol: str, action: Literal["close", "cancel"], session: Annotated[AsyncSession, Depends(get_session)]) -> None:
-    """一键平仓（同时停止行情交易）、清除挂单：交给执行器执行，结果写入时间线"""
+    """一键平仓（同时停止该币的行情交易）、清除挂单：交给执行器执行，结果写入时间线"""
     label = "平仓" if action == "close" else "清除挂单"
-    if await session.get(TradingSymbol, symbol) is None:
-        raise HTTPException(status.HTTP_404_NOT_FOUND, f"{symbol} 不在交易列表中")
+    s = await get_symbol(session, symbol)
     await fresh_snapshot(symbol, label)
     if action == "close":
         # 不停止的话，平仓后会重新分析，可能马上又开仓
-        await set_running(session, False)
+        await set_running(session, s, False)
     await redis.set(MANUAL_ACTION_KEY.format(symbol), action, ex=MANUAL_ACTION_TTL_SECONDS)
 
 
@@ -435,12 +456,10 @@ async def list_position_history_symbols(session: Annotated[AsyncSession, Depends
 
 @router.post("/symbols/{symbol}/analyze", status_code=status.HTTP_202_ACCEPTED)
 async def request_analysis(symbol: str, session: Annotated[AsyncSession, Depends(get_session)]) -> None:
-    """排队一次手动分析：引擎停止时为试运行，计划只记录、不下单"""
-    s = await session.get(TradingSymbol, symbol)
-    if s is None:
-        raise HTTPException(status.HTTP_404_NOT_FOUND, f"{symbol} 不在交易列表中")
-    if (await get_account(session)).capital_usdt is None:
-        raise HTTPException(status.HTTP_400_BAD_REQUEST, "还没有设置交易资金")
+    """排队一次手动分析：该币停止交易时为试运行，计划只记录、不下单"""
+    s = await get_symbol(session, symbol)
+    if s.capital_usdt is None:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST, f"{symbol} 还没有设置交易资金")
     running = await session.scalar(select(func.count()).where(TradingAnalysis.symbol == symbol, TradingAnalysis.status == "running"))
     if running or s.analysis_requested_at is not None:
         raise HTTPException(status.HTTP_409_CONFLICT, f"{symbol} 已在分析或排队中")
diff --git a/backend/src/alphapulse/models/trading.py b/backend/src/alphapulse/models/trading.py
index 626266b..e9da887 100644
--- a/backend/src/alphapulse/models/trading.py
+++ b/backend/src/alphapulse/models/trading.py
@@ -9,7 +9,7 @@ from alphapulse.core.db import Base
 
 
 class TradingAccount(Base):
-    """币安模拟盘账户：单行（id=1）。key 只以密文存储；running 是引擎启停的唯一来源"""
+    """币安模拟盘账户：单行（id=1）。key 只以密文存储；启停和交易资金按币种设置，见 TradingSymbol"""
 
     __tablename__ = "trading_account"
     __table_args__ = (CheckConstraint("id = 1", name="trading_account_single_row"),)
@@ -18,10 +18,6 @@ class TradingAccount(Base):
     api_key_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
     api_secret_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
     api_key_hint: Mapped[str | None] = mapped_column(String(8))
-    running: Mapped[bool] = mapped_column(Boolean, default=False)
-    running_changed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
-    # 交易资金：仓位计算按 min(交易资金, 账户权益)，不动用账户的全部余额；未设置时不能开始交易
-    capital_usdt: Mapped[Decimal | None] = mapped_column(Numeric)
     # 交易分析用的模型配置；为空时用默认配置
     provider_id: Mapped[int | None] = mapped_column(ForeignKey("ai_providers.id", ondelete="SET NULL"))
     reasoning_effort: Mapped[str | None] = mapped_column(String(8))
@@ -33,6 +29,11 @@ class TradingSymbol(Base):
 
     symbol: Mapped[str] = mapped_column(String(32), primary_key=True)
     added_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    # 该币引擎启停的唯一来源：停止时不自动分析、不挂新的入场单，已有持仓的程序规则照常执行
+    running: Mapped[bool] = mapped_column(Boolean, default=False)
+    running_changed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    # 该币的交易资金：仓位按 min(交易资金, 账户权益) 计算；各币合计不超过账户权益；未设置时不能开始交易
+    capital_usdt: Mapped[Decimal | None] = mapped_column(Numeric)
     # 待执行的分析请求：多个触发在执行前合并为一次
     analysis_requested_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
     analysis_reasons: Mapped[list[str]] = mapped_column(JSONB, default=list)
diff --git a/backend/src/alphapulse/trading/analyst.py b/backend/src/alphapulse/trading/analyst.py
index c35f41d..6ae0294 100644
--- a/backend/src/alphapulse/trading/analyst.py
+++ b/backend/src/alphapulse/trading/analyst.py
@@ -64,7 +64,7 @@ INSTRUCTIONS = f"""你是 AlphaPulse 的模拟盘交易分析器：为一个币
 - 止损：区间远端外 {rules.STOP_ATR_FACTOR}×ATR14(5m)，做多放在 zone_low 下方，做空放在 zone_high 上方；且距挂单价至少 {rules.MIN_STOP_ATR}×ATR14(5m)，挂单价贴近远端时按这条算。
 - 止盈：按成交均价，做多 {_ladder("long")}；做空 {_ladder("short")}。止盈 1 成交后撤销未成交的入场部分，止损移到保本价。
 - 首次成交后最长持仓 {rules.MAX_HOLD_HOURS} 小时，到时市价平仓。平仓后程序会请你重新分析。
-- 仓位：单笔风险为交易资金的 {_pct(rules.RISK_PCT)}，置信度低时减半；名义仓位合计不超过 {rules.MAX_LEVERAGE} 倍交易资金。
+- 仓位：单笔风险为该币交易资金的 {_pct(rules.RISK_PCT)}，置信度低时减半；名义仓位不超过 {rules.MAX_LEVERAGE} 倍该币交易资金。
 - reevaluate：任一条件满足时程序重新请你分析（最多 {rules.MAX_REEVALUATE} 个），用来表达另一侧方向、需要重新划区的位置。
 
 ## 程序的硬性校验
@@ -137,15 +137,16 @@ async def prepare(symbol: str, reasons: list[str], analysis_id: int) -> Prepared
         target = await session.get(TradingSymbol, symbol)
         if target is None:
             raise AnalysisError(f"{symbol} 已不在交易列表中")
-        if account is None or account.capital_usdt is None:
-            raise AnalysisError("还没有设置交易资金")
+        if account is None:
+            raise AnalysisError("还没有填写模拟盘 key")
+        if target.capital_usdt is None:
+            raise AnalysisError(f"{symbol} 还没有设置交易资金")
         provider = await session.get(AiProvider, account.provider_id) if account.provider_id else await session.scalar(
             select(AiProvider).where(AiProvider.is_default)
         )
         if provider is None:
             raise AnalysisError("没有可用的模型配置，请先到「环境变量」页面添加")
         session.expunge(provider)
-        symbols = list((await session.scalars(select(TradingSymbol.symbol))).all())
         recent = (await session.scalars(
             select(TradingAnalysis)
             .where(TradingAnalysis.symbol == symbol, TradingAnalysis.status == "done", TradingAnalysis.id != analysis_id)
@@ -163,20 +164,20 @@ async def prepare(symbol: str, reasons: list[str], analysis_id: int) -> Prepared
             )).all()
         ] if current else []
         system = "\n\n".join([INSTRUCTIONS, "## 数据概况", await data_overview(session), await skills_section(session)])
-        dry_run = not account.running
+        dry_run = not target.running
+        capital_usdt = target.capital_usdt
         effort = account.reasoning_effort or provider.reasoning_effort
 
     snapshot = await read_snapshot()
     if not snapshot or not snapshot["account"]:
         raise AnalysisError("取不到模拟盘账户快照（引擎未同步到币安），无法计算仓位")
     equity = Decimal(snapshot["account"]["margin_balance"])
-    capital = min(account.capital_usdt, equity)
+    capital = min(capital_usdt, equity)
     position = next((p for p in snapshot["positions"] if p["symbol"] == symbol), None)
-    other_notional = sum((Decimal(p["notional"]) for p in snapshot["positions"] if p["symbol"] != symbol and p["symbol"] in symbols), Decimal(0))
     symbol_rules_ = await symbol_rules(symbol)
     mark = await mark_price(symbol)
     context = PlanContext(
-        mark_price=mark, capital=capital, other_notional=other_notional, rules=symbol_rules_, atr=await recent_atr(symbol),
+        mark_price=mark, capital=capital, rules=symbol_rules_, atr=await recent_atr(symbol),
         has_plan=current is not None, position_side=position_side(snapshot, symbol),
     )
 
@@ -186,12 +187,12 @@ async def prepare(symbol: str, reasons: list[str], analysis_id: int) -> Prepared
         "## 任务",
         f"- 币种：{symbol}（币安 U 本位永续）",
         f"- 触发原因：{'；'.join(reasons)}",
-        f"- 运行模式：{'试运行（引擎已停止，计划只记录、不下单）' if dry_run else '交易中（计划会在模拟盘执行）'}",
+        f"- 运行模式：{'试运行（该币未在交易，计划只记录、不下单）' if dry_run else '交易中（计划会在模拟盘执行）'}",
         "",
         "## 账户（程序据此计算数量）",
-        f"- 交易资金：{capital:.2f} USDT（设定 {account.capital_usdt} USDT，账户权益 {equity:.2f} USDT，取较小者）",
+        f"- 该币交易资金：{capital:.2f} USDT（设定 {capital_usdt} USDT，账户权益 {equity:.2f} USDT，取较小者）",
         f"- 本次单笔风险金额：{risk:.2f} USDT（{_pct(rules.RISK_PCT)}；置信度低时 {risk * rules.LOW_CONFIDENCE_FACTOR:.2f}）",
-        f"- 可用名义仓位：{capital * rules.MAX_LEVERAGE - other_notional:.2f} USDT（{rules.MAX_LEVERAGE} 倍交易资金减去交易列表其他币的持仓 {other_notional:.2f}）",
+        f"- 名义仓位上限：{capital * rules.MAX_LEVERAGE:.2f} USDT（{rules.MAX_LEVERAGE} 倍该币交易资金）",
         f"- 模拟盘交易规则：价格精度 {symbol_rules_.tick_size}，数量精度 {symbol_rules_.step_size}，最小下单金额 {symbol_rules_.min_notional} USDT",
         f"- 模拟盘标记价：{mark}（校验以此为准；行情数据来自实盘，两者通常相差不到 0.1%）",
         f"- 最近已收盘 5m K 线的 ATR14：{context.atr:.{max(0, -symbol_rules_.tick_size.as_tuple().exponent)}f}（程序按它计算止损）",
@@ -266,8 +267,8 @@ async def submit(prepared: Prepared, symbol: str, analysis_id: int, arguments: d
 async def run_analysis(symbol: str, reasons: list[str]) -> None:
     """一次完整的分析；结果和失败原因都写进 trading_analyses 和时间线，不向外抛出"""
     async with SessionLocal() as session:
-        account = await session.get(TradingAccount, 1)
-        analysis = TradingAnalysis(symbol=symbol, reasons=reasons, dry_run=not (account and account.running), status="running")
+        target = await session.get(TradingSymbol, symbol)
+        analysis = TradingAnalysis(symbol=symbol, reasons=reasons, dry_run=not (target and target.running), status="running")
         session.add(analysis)
         await session.commit()
         analysis_id, dry_run = analysis.id, analysis.dry_run
diff --git a/backend/src/alphapulse/trading/executor.py b/backend/src/alphapulse/trading/executor.py
index 314ef87..22e2c70 100644
--- a/backend/src/alphapulse/trading/executor.py
+++ b/backend/src/alphapulse/trading/executor.py
@@ -599,7 +599,7 @@ class Executor:
             for symbol in symbols:
                 try:
                     manual_action = await redis.getdel(MANUAL_ACTION_KEY.format(symbol.symbol))
-                    await self.reconcile(session, client, symbol, account.running, positions.get(symbol.symbol), manual_action)
+                    await self.reconcile(session, client, symbol, symbol.running, positions.get(symbol.symbol), manual_action)
                 except ExchangeError as e:
                     await session.rollback()
                     await self.report(session, symbol.symbol, f"对账失败：{e}")
diff --git a/backend/src/alphapulse/trading/plan.py b/backend/src/alphapulse/trading/plan.py
index 897b14d..1d9b5ef 100644
--- a/backend/src/alphapulse/trading/plan.py
+++ b/backend/src/alphapulse/trading/plan.py
@@ -93,10 +93,8 @@ class SymbolRules:
 @dataclass
 class PlanContext:
     mark_price: Decimal
-    # min(设定的交易资金, 账户权益)
+    # 该币的 min(交易资金, 账户权益)
     capital: Decimal
-    # 交易列表中其他币的持仓名义价值合计
-    other_notional: Decimal
     rules: SymbolRules
     # 最近已收盘 5m K 线的 ATR14，用于计算止损
     atr: Decimal
@@ -154,9 +152,8 @@ def setup_stop(direction: Direction, entry: Decimal, far_edge: Decimal, atr_valu
     return round_to_step(max(far_edge + STOP_ATR_FACTOR * atr_value, entry + MIN_STOP_ATR * atr_value), tick, ROUND_CEILING)
 
 
-def size_entry(direction: Direction, price: Decimal, stop: Decimal, *, capital: Decimal, other_notional: Decimal,
-               confidence: str, rules: SymbolRules) -> dict:
-    """按入场价和止损算数量：单笔风险上限与全账户杠杆取小。止损离入场价太远、方向不对或数量不足时抛 PlanError"""
+def size_entry(direction: Direction, price: Decimal, stop: Decimal, *, capital: Decimal, confidence: str, rules: SymbolRules) -> dict:
+    """按入场价和止损算数量：单笔风险上限与该币资金的杠杆上限取小。止损离入场价太远、方向不对或数量不足时抛 PlanError"""
     sign = 1 if direction == "long" else -1
     stop_pct = sign * (price - stop) / price
     if stop_pct <= 0:
@@ -165,9 +162,7 @@ def size_entry(direction: Direction, price: Decimal, stop: Decimal, *, capital:
         raise PlanError([f"止损 {stop} 距入场价 {price} {stop_pct * 100:.2f}%，超过 {MAX_STOP_PCT * 100:.0f}%"])
     unit_loss = abs(price - stop) + (price + stop) * TAKER_FEE_RATE
     risk_amount = capital * RISK_PCT * (LOW_CONFIDENCE_FACTOR if confidence == "low" else 1)
-    max_notional = capital * MAX_LEVERAGE - other_notional
-    if max_notional <= 0:
-        raise PlanError([f"交易列表其他币的名义仓位 {other_notional:.2f} 已达到 {MAX_LEVERAGE} 倍交易资金，不能开新仓"])
+    max_notional = capital * MAX_LEVERAGE
     by_risk = risk_amount / unit_loss
     by_leverage = max_notional / price
     quantity = round_to_step(min(by_risk, by_leverage), rules.step_size, ROUND_FLOOR)
@@ -246,8 +241,7 @@ def check_setup(plan: TradePlan, ctx: PlanContext) -> dict:
         raise PlanError(errors)
     stop = setup_stop(direction, entry, setup.zone_low if long else setup.zone_high, ctx.atr, rules.tick_size)
     try:
-        sizing = size_entry(direction, entry, stop, capital=ctx.capital, other_notional=ctx.other_notional,
-                            confidence=plan.confidence, rules=rules)
+        sizing = size_entry(direction, entry, stop, capital=ctx.capital, confidence=plan.confidence, rules=rules)
     except PlanError as e:
         raise PlanError([f"止损 {stop}（区间{'下沿' if long else '上沿'}外 {STOP_ATR_FACTOR}×ATR(5m)，且距挂单价至少 "
                          f"{MIN_STOP_ATR}×ATR(5m)，ATR={ctx.atr.quantize(rules.tick_size)}）：{e}。"
diff --git a/backend/src/alphapulse/trading/schedule.py b/backend/src/alphapulse/trading/schedule.py
index 2007971..0ff43bf 100644
--- a/backend/src/alphapulse/trading/schedule.py
+++ b/backend/src/alphapulse/trading/schedule.py
@@ -7,7 +7,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from alphapulse.ai.tools import LOCAL_TZ
 from alphapulse.core.db import SessionLocal
-from alphapulse.models import TradingAccount, TradingAnalysis, TradingEvent, TradingSymbol
+from alphapulse.models import TradingAnalysis, TradingEvent, TradingSymbol
 from alphapulse.trading.plan import DAILY_ANALYSIS_LIMIT, MIN_ANALYSIS_GAP, next_routine_at
 
 # 自动分析失败后的重试：间隔、连续失败上限
@@ -29,9 +29,8 @@ async def daily_limit_reached(session: AsyncSession) -> bool:
 
 async def request_analysis(session: AsyncSession, symbol: str, reason: str) -> None:
     """排队一次自动分析：多个原因合并；距上次分析不足最短间隔时顺延。调用方负责 commit"""
-    account = await session.get(TradingAccount, 1)
     target = await session.get(TradingSymbol, symbol)
-    if account is None or not account.running or target is None or await daily_limit_reached(session):
+    if target is None or not target.running or await daily_limit_reached(session):
         return
     now = datetime.now(UTC)
     last_started = await session.scalar(select(func.max(TradingAnalysis.started_at)).where(TradingAnalysis.symbol == symbol))
@@ -43,13 +42,10 @@ async def request_analysis(session: AsyncSession, symbol: str, reason: str) -> N
 
 
 async def routine_requests() -> None:
-    """交易中：到例行时间的币排队例行分析；自动分析失败的隔一段时间重试"""
+    """交易中的币：到例行时间的排队例行分析；自动分析失败的隔一段时间重试"""
     async with SessionLocal() as session:
-        account = await session.get(TradingAccount, 1)
-        if account is None or not account.running:
-            return
         now = datetime.now(UTC)
-        for target in (await session.scalars(select(TradingSymbol))).all():
+        for target in (await session.scalars(select(TradingSymbol).where(TradingSymbol.running))).all():
             if target.analysis_requested_at is not None:
                 continue
             recent = (await session.scalars(
diff --git a/backend/tests/test_plan.py b/backend/tests/test_plan.py
index dc369a8..9ea75d8 100644
--- a/backend/tests/test_plan.py
+++ b/backend/tests/test_plan.py
@@ -41,7 +41,7 @@ def bars_until(hhmm: str) -> list[Bar]:
 
 def context(**overrides) -> PlanContext:
     values = {
-        "mark_price": Decimal("81000"), "capital": Decimal("1000"), "other_notional": Decimal("0"), "rules": BTC,
+        "mark_price": Decimal("81000"), "capital": Decimal("1000"), "rules": BTC,
         "atr": Decimal("100"), "has_plan": False, "position_side": None,
     }
     return PlanContext(**{**values, **overrides})
@@ -84,7 +84,7 @@ def test_atr_and_stop_from_example():
     # 做多：支撑区 80200–80700 内挂 80500；止损 80200 − 0.5 × 302.97 = 80048.51 → 向下取整 80048.5，距挂单价 0.56%
     stop = setup_stop("long", Decimal("80500"), Decimal("80200"), value, BTC.tick_size)
     assert stop == Decimal("80048.5")
-    entry = size_entry("long", Decimal("80500"), stop, capital=Decimal("1000"), other_notional=Decimal("0"), confidence="medium", rules=BTC)
+    entry = size_entry("long", Decimal("80500"), stop, capital=Decimal("1000"), confidence="medium", rules=BTC)
     assert entry["stop_pct"] == "0.56"
     # 10 ÷ (451.5 + (80500 + 80048.5) × 0.0004 = 515.72) = 0.01939… → 0.0193
     assert entry["quantity"] == "0.0193"
@@ -101,15 +101,15 @@ def test_stop_keeps_one_atr_from_entry():
 
 def test_size_entry_rejects_far_stop_and_halves_low_confidence():
     with pytest.raises(PlanError, match="超过 1%"):
-        size_entry("long", Decimal("80000"), Decimal("79100"), capital=Decimal("1000"), other_notional=Decimal("0"), confidence="high", rules=BTC)
+        size_entry("long", Decimal("80000"), Decimal("79100"), capital=Decimal("1000"), confidence="high", rules=BTC)
     with pytest.raises(PlanError, match="亏损一侧"):
-        size_entry("short", Decimal("80000"), Decimal("79900"), capital=Decimal("1000"), other_notional=Decimal("0"), confidence="high", rules=BTC)
-    medium = size_entry("long", Decimal("80000"), Decimal("79600"), capital=Decimal("1000"), other_notional=Decimal("0"), confidence="medium", rules=BTC)
-    low = size_entry("long", Decimal("80000"), Decimal("79600"), capital=Decimal("1000"), other_notional=Decimal("0"), confidence="low", rules=BTC)
+        size_entry("short", Decimal("80000"), Decimal("79900"), capital=Decimal("1000"), confidence="high", rules=BTC)
+    medium = size_entry("long", Decimal("80000"), Decimal("79600"), capital=Decimal("1000"), confidence="medium", rules=BTC)
+    low = size_entry("long", Decimal("80000"), Decimal("79600"), capital=Decimal("1000"), confidence="low", rules=BTC)
     assert (medium["risk_amount"], low["risk_amount"]) == ("10.00", "5.00")
-    # 止损很近时按 3 倍杠杆封顶：3000 − 其他币 1000 = 2000 ÷ 80000 = 0.025
-    capped = size_entry("long", Decimal("80000"), Decimal("79990"), capital=Decimal("1000"), other_notional=Decimal("1000"), confidence="high", rules=BTC)
-    assert (capped["quantity"], capped["capped_by_leverage"]) == ("0.0250", True)
+    # 止损很近时按该币资金的 3 倍杠杆封顶：3000 ÷ 80000 = 0.0375
+    capped = size_entry("long", Decimal("80000"), Decimal("79990"), capital=Decimal("1000"), confidence="high", rules=BTC)
+    assert (capped["quantity"], capped["capped_by_leverage"]) == ("0.0375", True)
 
 
 def test_take_profit_ladders():
diff --git a/web/src/apis/settings.ts b/web/src/apis/settings.ts
index 2224471..42f3fd4 100644
--- a/web/src/apis/settings.ts
+++ b/web/src/apis/settings.ts
@@ -67,6 +67,7 @@ export function testProvider(id: number): Promise<TestResult> {
 export interface Exchange {
   configured: boolean
   api_key_hint: string | null
+  /** 是否有币种在交易：交易中不能修改 key */
   running: boolean
   updated_at: string | null
 }
diff --git a/web/src/apis/trading.ts b/web/src/apis/trading.ts
index 48d5046..329ff15 100644
--- a/web/src/apis/trading.ts
+++ b/web/src/apis/trading.ts
@@ -54,12 +54,6 @@ export interface Snapshot {
 
 export interface TradingStatus {
   configured: boolean
-  running: boolean
-  running_changed_at: string | null
-  /** 设定的交易资金，十进制字符串；未设置时不能开始交易 */
-  capital_usdt: string | null
-  /** 实际用于仓位计算的资金：min(交易资金, 账户权益) */
-  effective_capital: string | null
   provider_id: number | null
   reasoning_effort: Effort | null
   /** trader 进程离线时为空 */
@@ -72,6 +66,13 @@ export interface TradingSymbol {
   added_at: string
   analysis_requested_at: string | null
   analyzing: boolean
+  /** 该币是否在交易；停止时分析为试运行，不挂新的入场单 */
+  running: boolean
+  running_changed_at: string | null
+  /** 该币的交易资金，十进制字符串；未设置时不能开始交易 */
+  capital_usdt: string | null
+  /** 实际用于仓位计算的资金：min(交易资金, 账户权益) */
+  effective_capital: string | null
   /** 执行器正在管理的计划 */
   plan_id: number | null
   plan_status: "pending" | "open" | "closing" | null
@@ -103,15 +104,20 @@ export function getStatus(): Promise<TradingStatus> {
   return http.get("/trading/status")
 }
 
-export function startTrading(): Promise<TradingStatus> {
-  return http.post("/trading/start")
+export function startTrading(symbol: string): Promise<void> {
+  return http.post(`/trading/symbols/${symbol}/start`)
 }
 
-export function stopTrading(): Promise<TradingStatus> {
-  return http.post("/trading/stop")
+export function stopTrading(symbol: string): Promise<void> {
+  return http.post(`/trading/symbols/${symbol}/stop`)
 }
 
-export function patchConfig(body: { capital_usdt?: string | null, provider_id?: number | null, reasoning_effort?: Effort | null }): Promise<TradingStatus> {
+/** 设置该币的交易资金：各币合计不超过账户权益 */
+export function patchSymbol(symbol: string, body: { capital_usdt: string | null }): Promise<void> {
+  return http.patch(`/trading/symbols/${symbol}`, body)
+}
+
+export function patchConfig(body: { provider_id?: number | null, reasoning_effort?: Effort | null }): Promise<TradingStatus> {
   return http.patch("/trading/config", body)
 }
 
@@ -321,7 +327,7 @@ export function requestAnalysis(symbol: string): Promise<void> {
   return http.post(`/trading/symbols/${symbol}/analyze`)
 }
 
-/** 一键平仓（同时停止行情交易）、清除挂单：由执行器在几秒内执行，结果写入时间线 */
+/** 一键平仓（同时停止该币的行情交易）、清除挂单：由执行器在几秒内执行，结果写入时间线 */
 export function manualAction(symbol: string, action: "close" | "cancel"): Promise<void> {
   return http.post(`/trading/symbols/${symbol}/manual/${action}`)
 }
diff --git a/web/src/pages/settings/index.vue b/web/src/pages/settings/index.vue
index 6cf43e1..ac209db 100644
--- a/web/src/pages/settings/index.vue
+++ b/web/src/pages/settings/index.vue
@@ -275,7 +275,7 @@ loadExchange()
         </el-descriptions-item>
         <el-descriptions-item label="状态">
           <el-tag v-if="exchange.running" type="success" size="small">
-            交易中（停止后才能修改 key）
+            有币种在交易（全部停止后才能修改 key）
           </el-tag>
           <span v-else>未运行</span>
         </el-descriptions-item>
diff --git a/web/src/pages/trading/components/PlanCard.vue b/web/src/pages/trading/components/PlanCard.vue
index 9fb5f56..b025f29 100644
--- a/web/src/pages/trading/components/PlanCard.vue
+++ b/web/src/pages/trading/components/PlanCard.vue
@@ -1,12 +1,12 @@
 <script lang="ts" setup>
 import type { Analysis, OrderRow, PlanCondition, TradingSymbol } from "@/apis/trading"
-import { Document, Lightning } from "@element-plus/icons-vue"
+import { Document, Edit, Lightning, SwitchButton, VideoPlay } from "@element-plus/icons-vue"
 import { CLOSE_REASON_LABELS, PLAN_STATUS_LABELS, TAKE_PROFIT_STEPS } from "@/apis/trading"
 import { formatTime } from "@/utils/text"
 
 /** analysis：执行中的计划，没有时为最近一次分析；latest：最近一次分析（与 analysis 不同时另行提示） */
-const props = defineProps<{ symbol: TradingSymbol, analysis: Analysis | null, latest: Analysis | null, orders: OrderRow[], requesting: boolean }>()
-const emit = defineEmits<{ analyze: [], detail: [id: number] }>()
+const props = defineProps<{ symbol: TradingSymbol, analysis: Analysis | null, latest: Analysis | null, orders: OrderRow[], requesting: boolean, toggling: boolean }>()
+const emit = defineEmits<{ analyze: [], detail: [id: number], toggle: [], capital: [] }>()
 
 const ACTION_LABELS = { plan: "新计划", keep: "维持当前计划", exit: "结束当前计划", wait: "观望" } as const
 const CONFIDENCE_LABELS = { high: "高", medium: "中", low: "低" } as const
@@ -74,11 +74,18 @@ const ladder = computed(() => sizing.value?.entry && entryRow.value
               {{ PLAN_STATUS_LABELS[analysis.plan_status] }}
             </el-tag>
           </div>
-          <div class="text-xs text-slate-500 font-normal">
+          <div class="truncate text-xs text-slate-500 font-normal" title="短线做波动（区间内挂限价单，最长持仓 4 小时）">
             短线做波动（区间内挂限价单，最长持仓 4 小时）
           </div>
         </div>
         <div class="flex-1" />
+        <el-button
+          :type="symbol.running ? 'danger' : 'success'" plain :icon="symbol.running ? SwitchButton : VideoPlay" :loading="toggling"
+          :disabled="!symbol.running && !symbol.capital_usdt" :title="!symbol.running && !symbol.capital_usdt ? '先设置交易资金' : ''"
+          @click="emit('toggle')"
+        >
+          {{ symbol.running ? "停止交易" : "开始交易" }}
+        </el-button>
         <el-button v-if="analysis && analysis.status !== 'running'" :icon="Document" @click="emit('detail', analysis.id)">
           查看完整分析
         </el-button>
@@ -88,8 +95,28 @@ const ladder = computed(() => sizing.value?.entry && entryRow.value
       </div>
     </template>
 
+    <div class="flex flex-wrap items-center gap-x-6 gap-y-1 border border-slate-200 rounded-lg border-solid bg-slate-50 px-3 py-2 text-xs text-slate-500">
+      <span class="flex items-center gap-1">
+        交易资金
+        <b v-if="symbol.capital_usdt" class="num text-sm text-slate-900">{{ Number(symbol.capital_usdt).toFixed(2) }} USDT</b>
+        <b v-else class="text-sm text-rose-600">未设置</b>
+        <el-icon class="cursor-pointer text-[var(--el-color-primary)]" title="设置交易资金" @click="emit('capital')">
+          <Edit />
+        </el-icon>
+      </span>
+      <span v-if="symbol.effective_capital && Number(symbol.effective_capital) < Number(symbol.capital_usdt)" class="text-amber-600">
+        权益不足，按 {{ Number(symbol.effective_capital).toFixed(2) }} 计算
+      </span>
+      <span v-if="symbol.capital_usdt">名义仓位上限 <b class="num text-slate-900">{{ (Number(symbol.effective_capital ?? symbol.capital_usdt) * 3).toFixed(2) }} USDT</b></span>
+      <span class="flex items-center gap-1">
+        <span class="h-2 w-2 rounded-full" :class="symbol.running ? 'bg-emerald-500' : 'bg-slate-300'" />
+        <span :class="symbol.running ? 'text-emerald-700' : ''">{{ symbol.running ? "交易中" : "已停止" }}</span>
+        <span v-if="symbol.running_changed_at" class="num">（{{ formatTime(symbol.running_changed_at, "MM-DD HH:mm") }} 起）</span>
+      </span>
+    </div>
+
     <div v-if="!analysis" class="border border-slate-200 rounded-lg border-solid bg-slate-50 px-3 py-2 text-slate-500">
-      还没有分析。引擎停止时点「立即分析」为试运行：计划只记录，不下单。
+      还没有分析。该币停止交易时点「立即分析」为试运行：计划只记录，不下单。
     </div>
     <div v-else-if="analysis.status === 'running'" class="flex items-center gap-2 border border-amber-200 rounded-lg border-solid bg-amber-50 px-3 py-2 text-amber-700">
       <span class="h-2 w-2 animate-pulse rounded-full bg-amber-500" />
diff --git a/web/src/pages/trading/index.vue b/web/src/pages/trading/index.vue
index 19fb83d..7127ef4 100644
--- a/web/src/pages/trading/index.vue
+++ b/web/src/pages/trading/index.vue
@@ -1,9 +1,9 @@
 <script lang="ts" setup>
 import type { Effort, Provider } from "@/apis/settings"
 import type { Analysis, OrderRow, SnapshotPosition, TradingEvent, TradingStatus, TradingSymbol } from "@/apis/trading"
-import { Clock, Edit, Plus } from "@element-plus/icons-vue"
+import { Clock, Plus } from "@element-plus/icons-vue"
 import { EFFORTS, listProviders } from "@/apis/settings"
-import { deleteSymbol, getStatus, getSymbolPlan, isOwnOrder, listAnalyses, listEvents, listSymbols, manualAction, patchConfig, requestAnalysis, startTrading, stopTrading } from "@/apis/trading"
+import { deleteSymbol, getStatus, getSymbolPlan, isOwnOrder, listAnalyses, listEvents, listSymbols, manualAction, patchConfig, patchSymbol, requestAnalysis, startTrading, stopTrading } from "@/apis/trading"
 import { usePersisted } from "@/utils/storage"
 import { formatTime } from "@/utils/text"
 import AddSymbolDialog from "./components/AddSymbolDialog.vue"
@@ -35,11 +35,10 @@ const snapshot = computed(() => status.value?.snapshot ?? null)
 const account = computed(() => snapshot.value?.account ?? null)
 const positions = computed(() => snapshot.value?.positions ?? [])
 const current = computed(() => symbols.value.find(s => s.symbol === selected.value))
-const engineText = computed(() => snapshot.value ? `在线 · ${status.value!.running ? "正在交易" : "已停止"}` : "离线")
-const capitalShort = computed(() => {
-  const s = status.value!
-  return s.effective_capital && s.capital_usdt && Number(s.effective_capital) < Number(s.capital_usdt)
-})
+const runningCount = computed(() => symbols.value.filter(s => s.running).length)
+const engineText = computed(() => snapshot.value ? `在线 · ${runningCount.value ? `${runningCount.value} 个币交易中` : "全部停止"}` : "离线")
+/** 各币交易资金合计，不超过账户权益 */
+const allocated = computed(() => symbols.value.reduce((sum, s) => sum + Number(s.capital_usdt ?? 0), 0))
 const symbolOrders = computed(() => {
   const s = snapshot.value
   if (!s)
@@ -140,7 +139,7 @@ async function analyze() {
   requesting.value = true
   try {
     await requestAnalysis(selected.value)
-    ElMessage.success(status.value?.running ? "已排队分析" : "已排队试运行分析：计划只记录，不下单")
+    ElMessage.success(current.value?.running ? "已排队分析" : "已排队试运行分析：计划只记录，不下单")
     await refresh()
   } finally {
     requesting.value = false
@@ -184,42 +183,45 @@ watch(selected, () => {
   refreshAnalysis()
 })
 
-async function toggleRunning() {
-  if (status.value!.running) {
+async function toggleRunning(s: TradingSymbol) {
+  if (s.running) {
     await ElMessageBox.confirm(
-      "停止后不再做新的分析，并撤销未成交的限价单。已有持仓保留，止损、止盈、到期平仓等程序规则继续执行。",
-      "停止行情交易",
+      `停止后 ${s.symbol} 不再做新的分析，并撤销未成交的限价单。已有持仓保留，止损、止盈、到期平仓等程序规则继续执行。`,
+      `停止 ${s.symbol} 行情交易`,
       { type: "warning", confirmButtonText: "停止" }
     )
   } else {
     await ElMessageBox.confirm(
-      "开始后，引擎会按触发条件和例行节奏自动分析交易列表里的币，并在币安模拟盘下单。",
-      "开始行情交易",
+      `开始后，引擎会按触发条件和例行节奏自动分析 ${s.symbol}，并按它的交易资金在币安模拟盘下单。`,
+      `开始 ${s.symbol} 行情交易`,
       { type: "info", confirmButtonText: "开始" }
     )
   }
   toggling.value = true
   try {
-    status.value = status.value!.running ? await stopTrading() : await startTrading()
+    await (s.running ? stopTrading(s.symbol) : startTrading(s.symbol))
+    await refresh()
     await refreshEvents()
   } finally {
     toggling.value = false
   }
 }
 
-async function editCapital() {
+async function editCapital(s: TradingSymbol) {
+  const others = allocated.value - Number(s.capital_usdt ?? 0)
   const { value } = await ElMessageBox.prompt(
-    `仓位按交易资金计算：单笔风险 1%（置信度低时 0.5%），所有仓位名义价值合计不超过 3 倍（逐仓 3 倍时保证金合计不超过交易资金）。不能超过账户权益 ${money(account.value?.margin_balance)} USDT；账户权益低于它时按权益计算。`,
-    "设置交易资金（USDT）",
+    `${s.symbol} 的仓位按它的交易资金计算：单笔风险 1%（置信度低时 0.5%），名义仓位不超过 3 倍交易资金。各币交易资金合计不能超过账户权益 ${money(account.value?.margin_balance)} USDT（其他币已分配 ${others.toFixed(2)}）；账户权益低于它时按权益计算。`,
+    `设置 ${s.symbol} 交易资金（USDT）`,
     {
-      inputValue: status.value!.capital_usdt ? num(status.value!.capital_usdt) : "",
+      inputValue: s.capital_usdt ? num(s.capital_usdt) : "",
       inputPattern: /^(?:[1-9]\d*|0)(?:\.\d{1,2})?$/,
       inputErrorMessage: "请输入正数，最多两位小数",
       confirmButtonText: "保存"
     }
   )
-  status.value = await patchConfig({ capital_usdt: value })
+  await patchSymbol(s.symbol, { capital_usdt: value })
   ElMessage.success("已保存")
+  await refresh()
   await refreshEvents()
 }
 
@@ -233,7 +235,7 @@ async function changeEffort(effort: Effort | null) {
 
 async function closePosition(symbol: string) {
   await ElMessageBox.confirm(
-    `撤销 ${symbol} 的全部挂单（含止损、止盈和手动挂的单），市价平掉持仓，并停止行情交易（所有币不再做新的分析）。`,
+    `撤销 ${symbol} 的全部挂单（含止损、止盈和手动挂的单），市价平掉持仓，并停止 ${symbol} 的行情交易（其他币不受影响）。`,
     "一键平仓",
     { type: "warning", confirmButtonText: "平仓" }
   )
@@ -290,32 +292,16 @@ onBeforeUnmount(() => clearInterval(timer))
             </div>
           </div>
         </div>
-        <el-button
-          :type="status.running ? 'danger' : 'primary'" :plain="status.running" :loading="toggling" size="small"
-          :disabled="!status.running && (!status.configured || !status.capital_usdt)"
-          @click="toggleRunning"
-        >
-          {{ status.running ? "停止行情交易" : "开始行情交易" }}
-        </el-button>
       </div>
 
       <div class="h-12 w-px bg-slate-200" />
 
       <div class="metric">
-        <div class="metric-label">
-          交易资金
-          <el-icon class="cursor-pointer text-[var(--el-color-primary)]" title="设置交易资金" @click="editCapital">
-            <Edit />
-          </el-icon>
+        <div class="metric-label" title="各币交易资金合计，在每个币的计划卡片上设置">
+          已分配资金
         </div>
-        <div v-if="status.capital_usdt" class="metric-value">
-          {{ money(status.capital_usdt) }}<small>USDT</small>
-        </div>
-        <div v-else class="metric-value text-rose-600!">
-          未设置
-        </div>
-        <div v-if="capitalShort" class="text-xs text-amber-600">
-          权益不足，按 {{ money(status.effective_capital!) }}
+        <div class="metric-value">
+          {{ allocated.toFixed(2) }}<small>USDT</small>
         </div>
       </div>
       <div class="metric">
@@ -386,9 +372,6 @@ onBeforeUnmount(() => clearInterval(timer))
     <el-alert v-if="!status.configured" type="warning" :closable="false" show-icon>
       还没有填写币安模拟盘 key，请先到「环境变量」页填写。
     </el-alert>
-    <el-alert v-else-if="!status.capital_usdt" type="warning" :closable="false" show-icon>
-      还没有设置交易资金。引擎只按交易资金计算仓位，不会动用账户的全部余额；设置后才能开始行情交易。
-    </el-alert>
     <el-alert v-else-if="snapshot?.error" type="error" :closable="false" show-icon>
       同步模拟盘失败：{{ snapshot.error }}{{ snapshot.synced_at ? `（以下为 ${formatTime(snapshot.synced_at, "HH:mm:ss")} 的数据）` : "" }}
     </el-alert>
@@ -505,7 +488,10 @@ onBeforeUnmount(() => clearInterval(timer))
         >
           <span class="absolute inset-y-0 left-0 w-1" :style="{ background: `var(--el-color-${symbolState(s).type})` }" />
           <div class="flex items-center justify-between">
-            <span class="num text-slate-900 font-semibold">{{ s.symbol }}</span>
+            <span class="flex items-center gap-2">
+              <span class="h-2 w-2 rounded-full" :class="s.running ? 'bg-emerald-500' : 'bg-slate-300'" :title="s.running ? '交易中' : '已停止'" />
+              <span class="num text-slate-900 font-semibold">{{ s.symbol }}</span>
+            </span>
             <el-tag :type="symbolState(s).type" size="small">
               {{ symbolState(s).label }}
             </el-tag>
@@ -526,8 +512,8 @@ onBeforeUnmount(() => clearInterval(timer))
       <!-- 中：当前计划 -->
       <PlanCard
         v-if="current" :symbol="current" :analysis="livePlan ?? latestAnalysis" :latest="latestAnalysis" :orders="planOrders"
-        :requesting="requesting"
-        @analyze="analyze" @detail="openAnalysis"
+        :requesting="requesting" :toggling="toggling"
+        @analyze="analyze" @detail="openAnalysis" @toggle="toggleRunning(current)" @capital="editCapital(current)"
       />
       <el-card v-else shadow="never">
         <el-empty description="先在左侧新增交易币种" :image-size="60" />