I was wondering what the best trading simulator is from those who've used them? I'd like to replay real days. Also, when you use the IB simulator is it anything like a real day? I want to test out a new way of manually trading on very short time frames, but would like to use as close to real data as possible. I realize this means paying for tick data history (speaking of that, any recommendations?). This is for ES and YM, but I don't think that matters as far as which simulator is concerned.