Trading Preferences
Choose how unfilled market-order quantity is handled
Open Settings → Trading to select the execution mode applied to future Market orders.
| Mode | Behavior | Use when |
|---|---|---|
| FAK (Fill and Kill) | Fill available quantity immediately and cancel the remainder | A partial fill is acceptable |
| FOK (Fill or Kill) | Fill the complete quantity immediately or cancel the order | You require the full size |
The preference does not change the behavior of resting Limit orders.
Both modes depend on available liquidity at submission time. Review the order estimate immediately before signing.