diff --git a/HTS_stocks.py b/HTS_stocks.py
index 6cc6d5a..766531e 100644
--- a/HTS_stocks.py
+++ b/HTS_stocks.py
@@ -120,11 +120,11 @@ class HTS_Stocks (HTS):
         slow_k_week, p_slow_k_week, slow_k_month, p_slow_k_month = -1, -1, -1, -1
         self.cursor_stock.execute('select stochastic_slow_k, max(ymd) from stock_analysis_weekly where code=? group by 1 order by ymd desc', (stock_code, ))
         items = self.cursor_stock.fetchone()
-        if items is not None and len(items)>0:
+        if items is not None and len(items)>1:
             slow_k_week, p_slow_k_week = items[0], items[1]
         self.cursor_stock.execute('select stochastic_slow_k, max(ymd) from stock_analysis_monthly where code=? group by 1 order by ymd desc', (stock_code, ))
         items = self.cursor_stock.fetchone()
-        if items is not None and len(items)>0:
+        if items is not None and len(items)>1:
             slow_k_month, p_slow_k_month = items[0], items[1]
 
         if slow_k_week is None or p_slow_k_week is None: