diff --git a/my_test.py b/my_test.py
index ae6a0c8..ea48a2d 100644
--- a/my_test.py
+++ b/my_test.py
@@ -23,7 +23,8 @@ def colsum(data, keys):
 
 store = pd.HDFStore('test.h5')
 if 1:
-	df = pd.DataFrame(np.array([[1, 2, 3, 101], [4, 5, 6, 102], [7, 8, 9, 103], [10, 11, 12, 104]]),columns=['high', 'low', 'open', 'close'])
+	index = pd.date_range('1/1/2001', periods=4, freq='D')
+	df = pd.DataFrame(np.array([[1, 2, 3, 101], [4, 5, 6, 102], [7, 8, 9, 103], [10, 11, 12, 104]]),columns=['high', 'low', 'open', 'close'], index=index)
 	store['df'] = df
 else:
 	df = store['df']
@@ -33,7 +34,7 @@ df['colsum'] = colsum(df, ['high', 'low', 'open', 'close'])
 df['ema(colsum)'] = ema(df, 'colsum')
 
 # Print table
-print(df)
+print(df.loc['2001-01-01':'2001-01-02'])
 
 # Plot graph
 df.plot()