Before I ask the Q, I must point out that I do not have any IT background, just a basic understanding. I am using X_trader platform trading ES. How can I know whether my broker provides best order execution speed, is it possible that another brokerage firm's better IT department is offering the same platform and achieving faster fills? I need it to be as fast as possible. Also, I use 2meg broadband, would T1 improve the speed of fills?