I have two separate IB accounts and this problem has happened in both accts. today at different times. When I tried to place an NQ order, I got the error message: "Your order is not accepted. In order to obtain the desired position your NET LIQ in USD denominated assets must exceed the margin req. for those assets." I contacted the help desk and the 1st time it happened the problem resolved itself in about 5-10 minutes before the chat guy could help. Contacting them again now. I have plenty of cash on hand to cover the margin...anyone else have this problem? I'm not happy, needless to say. When I placed a T-Bond order it would accept it, but not an NQ order.