Ultimate Guide to Understanding OCO Order Looking for Best article on OCO Order, then “Ultimate Guide to Understanding OCO Order”, is for you. An OCO, or “One Cancels the Other” order allows you to place two orders at the same time. It combines a limit order, with a stop-limit order, but only one of the two can be executed. In other words, as soon as one of the orders get … [Read more...] about Ultimate Guide to Understanding OCO Order