Market-on-Close orders http://www.nasdaqtrader.com/Trader.aspx?id=OpenClose#noii. NASDAQ Web site. nasdaqtrader.com http://www.nasdaqtrader.com/Trader.aspx?id=OpenClose http://www.nasdaqtrader.com/Trader.aspx?id=OpenClose#noii. Market-on-Close orders Market-on-Close orders