OCO (one-cancels-other)

What it does: links two orders so that when one executes, the other is automatically canceled.

Typical use: pairing take profit and stop loss as a single exit plan for an existing position.

Key parameters: leg a price/trigger, leg b price/trigger, and shared quantity (plus reduce-only where applicable).

Tradeoff: cleaner risk management, but requires careful sizing so both legs match your intended position exposure.

Example: long btc-usdc; set take profit at 61,200 and stop at 59,500 as oco; when either order fills, the other is canceled.