diff --git a/market_trade/core/CoreTraidMath.py b/market_trade/core/CoreTraidMath.py
index 8ed0114..a8c36e5 100644
--- a/market_trade/core/CoreTraidMath.py
+++ b/market_trade/core/CoreTraidMath.py
@@ -128,7 +128,7 @@ class CoreMath:
             window=self.params['actionOptions']['window']
             ans=np.asarray([])
             for i in range(len(self.col)-window+1):
-                ans=np.append(ans,np.std(self.col[i:i+window], ddof=1))
+                ans=np.append(ans, np.std(self.col[i:i+window], ddof=1))
             
         except:
             #window = len(self.col)
diff --git a/market_trade/notebooks/autogen/Make unified candlesticks data import.py b/market_trade/notebooks/autogen/Make unified candlesticks data import.py
index 0dca64f..1e407ec 100644
--- a/market_trade/notebooks/autogen/Make unified candlesticks data import.py	
+++ b/market_trade/notebooks/autogen/Make unified candlesticks data import.py	
@@ -6,9 +6,9 @@
 # In[1]:
 
 
-import market_trade.constants
+import market_trade.core.constants
 
-candlesticks_filepaths = [filepath for filepath in market_trade.constants.CANDLESTICK_DATASETS_PATH.iterdir()]
+candlesticks_filepaths = [filepath for filepath in market_trade.core.constants.CANDLESTICK_DATASETS_PATH.iterdir()]
 candlesticks_filepath = candlesticks_filepaths[0]
 candlesticks_filepath
 
@@ -69,7 +69,7 @@ a.analiz
 # In[5]:
 
 
-test_candlesticks = pd.read_csv(market_trade.constants.TEST_CANDLESTICKS_PATH)
+test_candlesticks = pd.read_csv(market_trade.core.constants.TEST_CANDLESTICKS_PATH)
 test_candlesticks['date'] = test_candlesticks['timestamp']
 test_candlesticks.drop(['timestamp'], axis=1, inplace=True)
 test_candlesticks.head()
diff --git a/market_trade/tests/test_dataloader.py b/market_trade/tests/test_dataloader.py
index a0d82de..894742d 100644
--- a/market_trade/tests/test_dataloader.py
+++ b/market_trade/tests/test_dataloader.py
@@ -1,13 +1,13 @@
-import market_trade.dataloader
-import market_trade.constants
+import market_trade.core.dataloader
+import market_trade.core.constants
 
 
 def test_dataloader(data_path):
-    duka_interface = (market_trade.dataloader.DukaMTInterface(data_path))
+    duka_interface = (market_trade.core.dataloader.DukaMTInterface(data_path))
     print(duka_interface.ask_candlesticks)
 
 
 if __name__ == '__main__':
-    candlesticks_filepaths = [filepath for filepath in market_trade.constants.CANDLESTICK_DATASETS_PATH.iterdir()]
+    candlesticks_filepaths = [filepath for filepath in market_trade.core.constants.CANDLESTICK_DATASETS_PATH.iterdir()]
     candlesticks_filepath = candlesticks_filepaths[0]
     test_dataloader(candlesticks_filepath)
\ No newline at end of file