Today IB liquidated two of my positions at very bad prices. There was no warning at all. Yesterday everything was OK. 1) Enough buying power 2) Enough current available funds. 3) IB leveragae factor was 1.6 Today: 1) Zero buying power 2) Current available funds in the red zone. 3) IB leverage factor is now 1.58 3) I'm not able to enter new positions at this moment. There was no change in any trading positions. I contacted IB customer service. They think that everything is OK for them and they don't have any problems with their margin calculations. I' m really pissed. I'm a customer for over 10 years with IB and now they come up with such a issue. Any other customers with this kind of problem? I know it is difficult to sue IB but I am willing to do so.