Fill or Kill (FOK)
Also called: fok
An order that must fill IMMEDIATELY in full or be cancelled entirely — no partial fills allowed.
Open TradingView charts →·Review Genesis FX →
Bank desks running interbank FX use FOK constantly to manage their exposure on big tickets. Retail platforms rarely see FOK orders because the size differential makes them unnecessary.
Frequently asked about fill or kill (fok)
What is a fill or kill (fok) in trading?+
When will I see fill or kill (fok) used in real trading?+
What is the most common mistake traders make with fill or kill (fok)?+
What do experienced traders know about fill or kill (fok) that beginners don't?+
Related terms
Immediate or Cancel (IOC)
advancedAn order that fills as much as possible immediately, then cancels the unfilled portion — no resting orders.
Good Till Cancelled (GTC)
beginnerAn order that stays active until you manually cancel it or it fills — used for set-and-forget pending orders.
Limit Order
beginnerAn order to buy or sell at a specific price or better — guarantees price, not execution.
Market Order
beginnerAn order to buy or sell immediately at the current market price — instant execution, no waiting.
Stop-Limit Order
intermediateA combination order that triggers like a stop but fills like a limit — protects against bad fills during fast markets.
Trailing Stop
intermediateA stop loss that automatically moves in your favor as price moves — locks in profit while letting winners run.