An Odd lot is considered to be the amount of shares not wholly divisible by a minimum board lot. Odd lots are traded at an Odd Lot board which are usually illiquidly traded and often at a discount to the stocks market price. You can enter odd lot orders by choosing the ODDLOT button on the order details box. Please note that odd lot orders can only be DAY orders, not GTC or ATC orders, which means you'll have to place your odd lot sell order again the next day if it is not matched today.