code: def __init__(self, cash, barFeed, fee=0.0025):
      commission = backtesting.TradePercentage(fee)
      super(BacktestingBroker, self).__init__(cash, barFeed, commission)
  
file_path: pyalgotrade/pyalgotrade/bitstamp/broker.py
imports: from pyalgotrade import broker
  from pyalgotrade.broker import backtesting
  from pyalgotrade.bitstamp import common
  from pyalgotrade.bitstamp import livebroker
label_desc: Use image node_id 1 to create a new BacktestingBroker object from inherited base classes: backtesting with example: obj = BacktestingBroker(cash, barFeed, fee)