diff --git a/vn.trader/ctaAlgo/ctaHistoryData.py b/vn.trader/ctaAlgo/ctaHistoryData.py
index 18304301..5039adee 100644
--- a/vn.trader/ctaAlgo/ctaHistoryData.py
+++ b/vn.trader/ctaAlgo/ctaHistoryData.py
@@ -278,7 +278,7 @@ class HistoryDataEngine(object):
         params = {}
         params['ticker'] = symbol
         if last:
-            params['startDate'] = last['date']
+            params['beginDate'] = last['date']
         
         data = self.datayesClient.downloadData(path, params)