Thats the main problem, that NOT everyone gets filled at the same price. I'm scalping in low liquidity market, with target 4-5 pips. The requests are sent simultaneously, but some of them get requote/slippage on opening and/or closing. Thats why I manage directly each account on separate terminal. But i'm looking for software that will solve this problem, and will meet my needs, as i get more clients.
At the moment I can say that strategy works well on TadawulFX (Standard) account spreads, and Alpari UK (Classic). Its not about spreads, but price feed are making sense too. As for example one of my client has FXSalt account, spreads are low (ECN with commision), but EA doesnt trade a lot. So we can say that its broker dependent. It could sound crazy for those who trade with with more than 30pips TP targets, but its a reality for scalpers. Once i've tested on MBCFX DEMO and it was very good results, but this broker isnt seems reliable to me.
Don't risk more then 2% with one trade!