If you close the MT4 trading system, take profit, stop loss and pending orders will still remain. But when you close the MT4 trading system, trailing stops and Expert Advisors (EAs) will stop running.
Trading Platform
If you close the MT4 trading system, take profit, stop loss and pending orders will still remain. But when you close the MT4 trading system, trailing stops and Expert Advisors (EAs) will stop running.