Hey Ahmed,
So, when you are on the Expert Advisor Studio, trying to generate a new strategy, you should see this the Generator settings:
You just need to click on where it says Preset Indicators. After you click it, you will get to the Entry and Exit Rules page where you can change the rules that you want your strategy to follow and see what brings better profit:
You just add the rules according to your strategy!
Also, about the broker, I would say to look to our trusted brokers and the reason for that is that we have seen better results using these brokers:
Hope this helps!
If you have any more questions, let me know!
Kind Regards,
Nikos