No .... Ameritrade will definitely not call you first .......
"Im not on margin with CCME, but I do have an account with TDA and I can say from experience that they will change the requirements per stock on you - try to call you - and if they do not get you on the first try will close all or part of your position within 5 minutes. They have done this to me - on a stock that 30 minutes later was back in a green position... Got to love em."