Using history data from different broker in MT5 (?)

[Gtrade]

I know that importing history data in MT4 from a different broker than the one used, will cause errors in backtesting because data don't match, for example using Dukascopy data from Tickstory and another broker to backtest will cause errors from my experience, but I wonder if using ticks data from Dukascopy with MT5 with another broker is reliable, so I would need to know if using tick data from Dukascopy, MT5 tries to match ticks with the broker timeframes history data that could lead to errors due to mismatch, or if whatever is the source of ticks using them with a different broker is reliable because MT5 creates timeframes for backtest from ticks...

I will do my tests, but I appreciate opinions.

Thanks.