The time in force for a stop order specifies how long the order will remain active. The most common time in force for stop orders are:
GTC (Good Till Canceled): The order will remain active until it is filled or cancelled by you.
Day: The order will expire at the end of the trading day.
OCO (One Cancels the Other): This can be a stop order or a limit order. If the stop order is filled, the limit order is automatically cancelled.