Fill or Kill (FOK)
An order that must execute immediately in its entirety or be cancelled completely. No partial fills allowed.
In Depth
Fill or Kill (FOK) is a fundamental concept in prediction market trading. In platforms like Polymarket with thousands of active markets, understanding fill or kill (fok) is essential for consistent profitability. TradeSphere data across 5,400+ markets shows that traders who master these concepts significantly outperform those trading on instinct.
In practice, fill or kill (fok) connects to Market Order, Limit Order, Slippage. PolyPulse tracks these metrics and publishes weekly analysis. For hands-on application, PolyFire provides real-time market data and copy trading via Telegram.
Related Terms
3Market Order
tradingAn order executed immediately at the best available price. Guarantees execution but not price.
Limit Order
tradingAn order to buy or sell shares at a specific price or better. Limit orders sit in the orderbook until filled or cancelled.
Slippage
tradingThe difference between expected and actual execution price. Increases in low-liquidity markets and with larger orders.
See It in Action
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