yup, AON=all or nothing, and yes they don't like filling them, POS, extra commisions, except ameritrade "if" all the fills are in the same day ,1 price........ There was 410,000 shares traded when i placed my buy @ ask, then only 10,000 went the rest of the day, and they passed my aon buy ,right by,,,,%^^&***(&*^%$