I don't know about you, but I'd contemplate carefully about opening a big account with a broker that attracts clients with gimmicks rather than reputation and quality of service. Also, food for thought, 20-30% welcome bonus says a lot about the ...

Taking advantage of the welcome bonus

That would depend on their account balance, so even if you found about their earnings it wouldn't really enlighten you much. I suggest asking about monthly gain % instead as that would be more pertinent to everybody's situation. No question about ...

What is monthly average earnings for forex traders?

I don't think that professional traders try to predict price, rather, their goal is to win more often than they lose. To do this one would need to have an edge. How to develop one you say? Dunno, that's why I'm here to find out .

How do forex traders predict price?