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A one-cancels-other order is a type of securities or futures order which treats two or more securities or futures orders as a package so that the execution of any one of the orders causes all the orders to be reduced by the same amount.[1][2][3][4] It is often referred to as an "OCO" order.


  1. One-Cancels-The-Other-Order. Investopedia.
  2. How "One Cancels Other" Works. OptionsXpress.
  3. Other Cancels The Other. Scottrade.
  4. One Cancels Other (OCO) Order. TradeKing.