I am currently trading the Russell emini. My broker is IB. The trading system I'm using requires I enter my first trades of the day 3 minutes before the market opens. IB is hitting me with over-night margin because of those 3 minutes. Are all brokers the same on this? There is a lot of variation on what brokers require for day trading margin but from what I can tell they all seem to have the same requirement for over-night margin.