I should admit that FXCESS is a good broker because I was kind of distrustful to them at first but after cooperating with them for a few months I changed my mind. By the way, the ECN account is so cool. I can trade major currency pairs with tight spreads which almost start from 0,0 pips and the commissions are not as expensive as I thought.
I knew that they have a lot of bonuses for traders but I couldn't understand what the terms and conditions I should meet to get these bonuses. So I contacted the support team and they explained everything clearly to me and then I got 40% of the power bonus.