Have you tried setting the Time of force to GTC? It works on tradezero but I can't say anything for other brokerages.
Thanks, but I'm not concerned about it. Mine is a pure prop account. Everything will be fine at 4AM tomorrow (I'm up pretty early every day, but not that early). If you're in a position and you're trying to put orders in on a Saturday, you probably shouldn't be trading prop. Maybe you are referring to the OP?