Wondering if anyone can share some more information regarding Interactive Brokers' Automatic Liquidation policy, especially how does it work for cash / registered / non-taxable. Here is the formal disclosure document https://www.interactivebrokers.ca/php/legalDocuments/AutoLiq.pdf Since for cash & registered accounts, the buying power is the cash balance, it is impossible to get a negative balance as a result of an order execution. The only way to get into a deficiency position is due to fees charged by IB, and there are a lot of complaints on the internet. People had a $40k position liquidated for a $12.50 fee. According to the policy I was also told by an IB person that IB would actually liquidate a position even when a cash balance is available, if the existing cash balance is in a different currency than the fee currency. Can you guys please share your experiences / knowledge on this topic? TIA.