This setting doesn’t influence autotrading. With '''GTC''' backtesting works as always. With '''DAY''' – '''Session Break''' is taken into consideration: all active price orders (Limit and Stop Limit) “forget” their statuses and on the new bar opening are considered to be newly placed, which leads to the situation when there’s a gap and the order is guaranteed to be executed, the orders are filled on the bar Open, and not on the Limit price.
This mode does not influence orders with special state (BreakEventBreakEven, PercentTrailing, Dollartrailing).