Time in Force
In the advanced mode, you may choose Time in Force. This is an order time retention policy, including the following modes:
Good Till Canceled (GTC): This order will be placed in the order queue and will remain valid until it is filled or canceled.
Good Till Time (GTT): This order will be canceled automatically if it fails to be executed within a fixed time.
Immediate or Cancel (IOC): The tradable part of this order will be executed immediately, and the remaining part will be canceled and never enter a buy or sell order.
Fill or Kill (FOK): The entire order will be executed immediately, otherwise, it will be canceled.
If you quit Time in Force, Good Till Canceled (GTC) will be executed by default. And if you enable post-only, only GTC and GTT are available in Time in force.