Close trade on stop margin rejection
When this option is enabled, if TAT attempts to place a stop order for an open trade, but that order is rejected by IBKR due to insufficient available margin/buying power, TAT will schedule the trade to be closed immediately. This will prevent a potential situation where you have a trade open with no active stop loss order.
This scenario should not happen unless you are trading dangerously close to 90-100% of your available buying power.