On-Stop (O/S) Order

A special-term order placed with the intention of trading at a later date when the price of the stock reaches the specified stop price. An on-stop order becomes a limit order once a trade at the trigger price has occurred.

Market Not Held Order

This is a market order where the investor gives the floor trader the discretion to execute the order when he feels it is best. If the floor trader feels that the market will decline, he may hold the order to try to get a better fill. This order may not get filled.

Market

The place where buyers and sellers meet to exchange goods and services. It also represents the actual or potential demand for a product or service.

Market On Close Order

This is an order to be executed at the market price when the market closes. Institutions frequently use this method to buy or sell large numbers of shares, e.g., when a stock is to be added or deleted from an index and the institution must buy or sell the stock for an index fund. These orders are also used on day trades in order to close a position at the end of the session regardless of the price. It can also be used when you want to exit a position that day, but do not want to cut off a stock that is running during the day-place a market on close order and your trade will be executed at the closing price. As with all market orders, there is risk in that the stock that was rising and hit a target you would be happy at selling at, but then falls right before the close.