diff --git a/HTS_etf.py b/HTS_etf.py
index c384a31..8369dd8 100644
--- a/HTS_etf.py
+++ b/HTS_etf.py
@@ -138,7 +138,7 @@ class HTS_etf (HTS):
 
                     if bs_buy_price > 0:
 
-                        if not self.orderChecker.exist(today, "A" + stock['stock_code'], mins=30):
+                        if not self.orderChecker.exist(today, "A" + stock['stock_code'], mins=60):
                             buy_count = self.getCount(stock['stock_code'], bs_buy_price)
 
                             if buy_count > 0: