how to buy and sell in backtest？

[graceyangfan]

I am a newer in quant，I see that when you do a live trading, the code use buy method from ccxt, so when doing a backrest, which buy method should I use，the method from ccxt or backtrader.These method in ccxt and backtrader have different parameters，so it means I should write two different version for backtest and live trading？

[donjonson]

I have not yet used this backtrader add on so I really dont know what I am talking about but I would reccomend not using the ccxt module in a backtest. you dont need to pull the data from your broker if your not trading live