My account at IB is around 30k but I scalp intraday. I put on very large positions when the setup is right. I use stops and never add to a position or average in. This means that I routinely trade a total $$$ amount of 300-500K every day. Average winning day is around 500 and average losing day is 250. I'm wondering if Interactive Brokers will A) care if I do this as long as my account stays above 25K and everything is closed out by EOD and B) charge me a lot for borrowing so much intraday? Finally, does anyone know what exact time IB enforces Reg-T and liquidates you? I get a message around 3:45 usually, that says it will commence in under 10min. I've never been liquidated, I'm just wondering if there is an exact time.