diff --git a/config_examples/Strategy004.py b/config_examples/Strategy004.py
index 545ab9833..18185d28d 100644
--- a/config_examples/Strategy004.py
+++ b/config_examples/Strategy004.py
@@ -5,6 +5,7 @@ from typing import Dict, List
 from functools import reduce
 from pandas import DataFrame
 # --------------------------------
+from datetime import datetime
 
 import talib.abstract as ta
 import subprocess