diff --git a/qlib/contrib/backtest/account.py b/qlib/contrib/backtest/account.py
index 5e2e03ea0..df7614979 100644
--- a/qlib/contrib/backtest/account.py
+++ b/qlib/contrib/backtest/account.py
@@ -153,7 +153,6 @@ class Account:
         # if stock is sold out, no stock price information in Position, then we should update account first, then update current position
         # if stock is bought, there is no stock in current position, update current, then update account
         # The cost will be substracted from the cash at last. So the trading logic can ignore the cost calculation
-        trade_amount = trade_val / trade_price
         if order.direction == Order.SELL:
             # sell stock
             self.update_state_from_order(order, trade_val, cost, trade_price)
diff --git a/qlib/contrib/strategy/rule_strategy.py b/qlib/contrib/strategy/rule_strategy.py
index 3b66b0f1e..222c56568 100644
--- a/qlib/contrib/strategy/rule_strategy.py
+++ b/qlib/contrib/strategy/rule_strategy.py
@@ -138,6 +138,9 @@ class SBBStrategyBase(RuleStrategy, OrderEnhancement):
                         // (self.trade_len - self.trade_index)
                         * _amount_trade_unit
                     )
+                if order.direction == order.SELL:
+                    if self.trade_amount[(order.stock_id, order.direction)] > 1e-5 and _order_amount is None:
+                        _order_amount = self.trade_amount[(order.stock_id, order.direction)]
 
                 if _order_amount:
                     self.trade_amount[(order.stock_id, order.direction)] -= _order_amount
@@ -167,6 +170,10 @@ class SBBStrategyBase(RuleStrategy, OrderEnhancement):
                         * 2
                         * _amount_trade_unit
                     )
+                if order.direction == order.SELL:
+                    if self.trade_amount[(order.stock_id, order.direction)] > 1e-5 and _order_amount is None:
+                        _order_amount = self.trade_amount[(order.stock_id, order.direction)]
+
                 if _order_amount:
                     _order_amount = min(_order_amount, self.trade_amount[(order.stock_id, order.direction)])
                     self.trade_amount[(order.stock_id, order.direction)] -= _order_amount