fix #2008

freqtrade/optimize/backtesting.py

@@ -319,6 +319,9 @@ class Backtesting(object):
             position_stacking: do we allow position stacking? (default: False)
         :return: DataFrame
         """
+        # Arguments are long and noisy, so this is commented out.
+        # Uncomment if you need to debug the backtest() method.
+#        logger.debug(f"Start backtest, args: {args}")
         processed = args['processed']
         stake_amount = args['stake_amount']
         max_open_trades = args.get('max_open_trades', 0)

freqtrade/optimize/hyperopt.py

@@ -195,7 +195,7 @@ class Hyperopt(Backtesting):
             {
                 'stake_amount': self.config['stake_amount'],
                 'processed': processed,
-                'position_stacking': self.config.get('position_stacking', True),
+                'position_stacking': self.config.get('position_stacking', False),
                 'start_date': min_date,
                 'end_date': max_date,
             }