I don't want to discredit any brokers but after many decades of trading, market orders might be executed minutes later. So do expect things might go wrong due to server overload, software bugs, heavy traffic or whatever.
or sometimes, it could be our keyboard or mouse (even if it is of superior quality) having intermittent problems.
or sometimes, it could be our keyboard or mouse (even if it is of superior quality) having intermittent problems.