Include Commissions in _trades DataFrame (#1277)

Author: abhirathmahipal

backtesting/_stats.py

@@ -67,6 +67,7 @@ def compute_stats(
             'SL': [t.sl for t in trades],
             'TP': [t.tp for t in trades],
             'PnL': [t.pl for t in trades],
+            'Commissions': [t._commissions for t in trades],
             'ReturnPct': [t.pl_pct for t in trades],
             'EntryTime': [t.entry_time for t in trades],
             'ExitTime': [t.exit_time for t in trades],

backtesting/test/_test.py

@@ -345,8 +345,9 @@ def almost_equal(a, b):
             for n in (SmaCross.fast, SmaCross.slow)]
         self.assertSequenceEqual(
             sorted(stats['_trades'].columns),
-            sorted(['Size', 'EntryBar', 'ExitBar', 'EntryPrice', 'ExitPrice', 'SL', 'TP',
-                    'PnL', 'ReturnPct', 'EntryTime', 'ExitTime', 'Duration', 'Tag',
+            sorted(['Size', 'EntryBar', 'ExitBar', 'EntryPrice', 'ExitPrice',
+                    'SL', 'TP', 'PnL', 'ReturnPct', 'EntryTime', 'ExitTime',
+                    'Duration', 'Tag', 'Commissions',
                     *indicator_columns]))
 
     def test_compute_stats_bordercase(self):