If I have an in the money call calendar spread approaching the near term expiration, in the account window, it says somewhere close to $2000 for post expiry margin. This is for a stock around $200. Assuming that I let it expire and take the assignment, will my margin on the following day be really close to the stated $2000 post expiry margin?? I want to be certain, because I want to avoid auto liquidation, but it seems like it should be higher than what the account window says. Because this would be short $20,000 in stock after assignment. Do they account for the long call that you still have and greatly reduce your margin requirement? I tried emailing support, but they never responded since a week ago now, which makes me really consider changing brokers.