1

backend/app/services/paper_trading_service.py

@@ -268,14 +268,16 @@ class PaperTradingService:
             return result
 
         # === 检查总杠杆是否超限 ===
-        # 计算当前已用保证金（持仓+挂单）
-        current_used_margin = len(self.active_orders) * self.margin_per_order
-        # 新订单增加的保证金
+        # 计算当前实际的已用保证金和持仓价值（使用订单实际值）
+        current_used_margin = sum(order.margin for order in self.active_orders.values())
+        current_total_position_value = sum(order.quantity for order in self.active_orders.values())
+
+        # 新订单增加的保证金和持仓价值
         new_margin = margin
-        # 新订单的总持仓价值 = 保证金 × 杠杆
-        new_position_value = new_margin * self.leverage
-        # 新增后的总持仓价值
-        new_total_position_value = (current_used_margin * self.leverage) + new_position_value
+        new_position_value = position_value
+
+        # 新增后的总持仓价值和总杠杆
+        new_total_position_value = current_total_position_value + new_position_value
 
         # 获取当前账户余额
         db = db_service.get_session()
@@ -300,7 +302,7 @@ class PaperTradingService:
 
         if new_total_leverage > self.max_total_leverage:
             msg = f"总杠杆超限！当前 {new_total_leverage:.1f}x，上限 {self.max_total_leverage}x"
-            logger.info(f"{msg}: {symbol} | 当前持仓价值: ${current_used_margin * self.leverage:,.0f} | "
+            logger.info(f"{msg}: {symbol} | 当前持仓价值: ${current_total_position_value:,.0f} | "
                        f"新订单持仓价值: ${new_position_value:,.0f} | 总持仓价值: ${new_total_position_value:,.0f} | "
                        f"账户余额: ${current_balance:,.0f}")
             result['message'] = msg
@@ -1783,9 +1785,14 @@ class PaperTradingService:
         Returns:
             账户状态信息，包括余额、已用保证金、可用保证金等
         """
-        # 计算已用保证金（每个活跃订单占用固定保证金）
+        # 计算已用保证金和总仓位价值（使用订单实际值，而非固定值）
         active_count = len(self.active_orders)
-        used_margin = active_count * self.margin_per_order
+        used_margin = 0
+        total_position_value = 0
+
+        for order in self.active_orders.values():
+            used_margin += order.margin  # 订单实际保证金
+            total_position_value += order.quantity  # 订单实际持仓价值
 
         # 计算已实现盈亏（从历史订单）
         db = db_service.get_session()
@@ -1812,7 +1819,6 @@ class PaperTradingService:
         current_balance = self.initial_balance + realized_pnl
 
         # 计算当前总杠杆（持仓价值 / 账户余额）
-        total_position_value = used_margin * self.leverage
         current_total_leverage = total_position_value / current_balance if current_balance > 0 else 0
 
         # 计算可用保证金