One Cancels the Other Order (OCO)

An OCO, or One Cancels the Other, order is a paired order type that lets traders place two orders simultaneously, with the condition that when one order is executed, the other is automatically cancelled. For example, a trader might set a limit sell order above the current market price to lock in a profit target and a stop-loss sell order below the current price to limit downside risk — both referencing the same position. Whichever price level is reached first triggers its respective order, and the other is immediately cancelled, ensuring the trader is not left with conflicting open orders.

OCO orders are particularly valuable for managing trades without requiring constant manual monitoring. They allow traders to define their exit strategy in advance, capturing gains if the market moves favorably while automatically cutting losses if it moves against them. This combination of a take-profit and a stop-loss in a single, linked order type is a fundamental risk management tool used across both manual and automated trading.

For algorithmic traders and bot users, OCO orders are a powerful feature that can be incorporated directly into automated strategies. Rather than relying on the trading bot to continuously monitor positions and issue separate orders, an OCO order delegates the exit logic to the exchange's own order management system, which can execute with lower latency and higher reliability. Most major cryptocurrency exchanges support OCO order types through their APIs, making them accessible to automated systems. When designing bot strategies, incorporating OCO orders for position management is considered a best practice for maintaining disciplined risk control.