An OCO order, or one-cancels-the-other order, links two orders so that if one side executes, the other is canceled. Binance Academy describes it as a way to combine a limit order with a stop-limit order. In plain trading terms, it lets a spot trader define both an upside target and a downside exit before emotion takes over.
The key detail is that the stop side is often a stop-limit order, not a guaranteed market exit. A stop price triggers the order, but the limit price controls the worst acceptable execution price. If the market moves through both levels too quickly, the limit order may remain unfilled. That is why conservative traders usually leave a gap between the stop trigger and the limit price.
A practical workflow is to decide position size first, set the profit-taking level second, set the invalidation level third, and only then place the OCO. After it is live, check that the quantity, time-in-force and direction match the position. If you manually cancel one side, confirm that the linked side is also removed so you do not leave accidental exposure on the book.
Risk notice: OCO orders reduce manual-monitoring risk, but they do not remove market, liquidity, gap or platform risk. This article is educational and not financial advice.
Sources: Binance Academy OCO glossary | Binance Academy order types | Binance stop-limit explanation
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