Market On Close (MOC) A market order to be executed as near to the end of the exchange day as possible. Also known as an "at-the-close order." Investopedia Says: This is an order entered sometime during the day that grants discretionary power to the trader, so that, as near as possible to the end of the trading day, a market order will be executed. Related Terms: At-the-close order Discretionary Account Market Order |