Thank you for your reply malaguti.

I don't optimize any of the parameters I do backtest on to avoid curvefitting. I plan to do forward testing to my strategies as well to measure their performance better. I just wondered whether MT4 had inferior backtesting qualities because it is free. I think MT4 cannot backtest strategies that incorporate indicators from different timeframes, but I am not sure. Maybe that is the advantage of the paid backtesters.

Can you recommend any backtesters that are free? Any of them capable of walk-forward testing? I downloaded M1 data from a free source and would like to give my strategies a try in a free application. I am a student so anything free, I will take it