Hey there!
I am not really sure what you mean…yes, we always get different results on the different brokers.
The price determined the values of the indicators (which are the trading rules behind the strategies).
So the best thing to do is to place the same EAs on a few brokers and test them for a month. See which broker will give you the best EAs.
This is what we showed with Ilan in our latest course Algorithmic Trading Course for Beginners + 40 EAs