Add Compatibility code for BT_DATA_COLUMNS

freqtrade/data/btanalysis.py

@@ -25,7 +25,6 @@ BT_DATA_COLUMNS = ['pair', 'stake_amount', 'amount', 'open_date', 'close_date',
                    'stop_loss_ratio', 'min_rate', 'max_rate', 'is_open', 'enter_tag',
                    'is_short'
                    ]
-# TODO-lev: usage of the above might need compatibility code (buy_tag, is_short?, ...?)
 
 
 def get_latest_optimize_filename(directory: Union[Path, str], variant: str) -> str:
@@ -160,6 +159,13 @@ def load_backtest_data(filename: Union[Path, str], strategy: Optional[str] = Non
                                               utc=True,
                                               infer_datetime_format=True
                                               )
+            # Compatibility support for pre short Columns
+            if 'is_short' not in df.columns:
+                df['is_short'] = 0
+            if 'enter_tag' not in df.columns:
+                df['enter_tag'] = df['buy_tag']
+                df = df.drop(['buy_tag'], axis=1)
+
     else:
         # old format - only with lists.
         raise OperationalException(