I am totally not trying to sound condescending here, but why would you even care? Your balance is gonna be right either way, let your accountant worry about it at the end of the year. That's why they exist. Your focus should be on winning the next trade using the chips in front of you. If IB locks up a few and you fail to understand why, it doesn't matter, your balance is still correct. I have found that worrying about stuff like this really shatters the mojo that's required to get in the groove. There's always gonna be something that distracts/upsets you. Don't let it. Focus on what's really important... winning the next trade. That's all that matters.