Hi community:

I just launched my first live and I saw there is some discrepancies between the live trading and backtest. So I started with some trades in live trading and I am expected to see the exact same or very similar when the same algorithm comes to the backtest. But I see them 90% different in terms of stock choice. 

Is this normal? Is my expectation realistic? If this is what I am looking for, any thing I can do with the algorithm to make this work?