They can close your position when the after hour trades hit your stop? No wonder one expert day trader told me to ALWAYS close all the positions before the market closed?Hmmmm, this style makes no sense to me, Scalping and some day trading is risking greater than reward, but my testing show anything you keep overnight is long term ruin of accounts, unless you constantly hedge with options can help but sometimes that is not an answer either. I think it is back to drawing board.