bt_main.py

import datetime
import backtrader as bt
from strategies import *

#Instantiate Cerebro engine
cerebro = bt.Cerebro()

#Set data parameters and add to Cerebro
data = bt.feeds.YahooFinanceCSVData(
    dataname='TSLA.csv',
    fromdate=datetime.datetime(2016, 1, 1),
    todate=datetime.datetime(2017, 12, 25))
	#settings for out-of-sample data
    #fromdate=datetime.datetime(2018, 1, 1),
    #todate=datetime.datetime(2019, 12, 25))

cerebro.adddata(data)

#Add strategy to Cerebro
cerebro.addstrategy(AverageTrueRange)

#Default position size
cerebro.addsizer(bt.sizers.SizerFix, stake=3)

if __name__ == '__main__':
	#Run Cerebro Engine
	start_portfolio_value = cerebro.broker.getvalue()

	cerebro.run()

	end_portfolio_value = cerebro.broker.getvalue()
	pnl = end_portfolio_value - start_portfolio_value
	print('Starting Portfolio Value: %.2f' % start_portfolio_value)
	print('Final Portfolio Value: %.2f' % end_portfolio_value)
	print('PnL: %.2f' % pnl)