diff --git a/src/tqsdk_real_engine.py b/src/tqsdk_real_engine.py
index 2d21a4b..d9a6bc3 100644
--- a/src/tqsdk_real_engine.py
+++ b/src/tqsdk_real_engine.py
@@ -353,7 +353,7 @@ class TqsdkEngine:
 
         new_bar = False
 
-        if True:
+        if is_trading_time:
             if not self.is_checked_rollover:
                 self._check_roll_over()
                 self.is_checked_rollover = True