One of the leading cryptocurrency exchange, Binance has enabled OCO order types (One Cancels the Other) to the web trading interface. PC and App clients will have the OCO order type enabled at a later date.
Basically, OCO is a pair of orders combining a stop-limit order and a limit maker order on the same side. This is basically with the same quantity. When either of the orders execute (the stop price triggers for stop limit order), the other one is automatically cancels. And when canceling either of the orders, the entire OCO pair cancels.