Order: A ticket or voucher representing long or short securities and options.

At-The-Opening Order: An order which specifies execution at the opening of the market or else it is cancelled.

Buy Stop Order: An order to purchase a security entered at a price above the current offering price triggered when the market hits a specified price.

Buy Stop Order: An order to purchase a security entered at a price above the current offering price triggered when the market hits a specified price.

Spread Order: An order to simultaneously transact two or more option trades. Typically, one option would be bought while another would simultaneously be sold. Spread orders may be limit orders, not held orders, or orders with discretion. They cannot be stop orders, however.

Spread Order: An order to simultaneously transact two or more option trades. Typically, one option would be bought while another would simultaneously be sold. Spread orders may be limit orders, not held orders, or orders with discretion. They cannot be stop orders, however.

Order Flow: The volume of orders being bought or sold on the exchanges.

Order Book Official: The exchange employee in charge of keeping a book of public limit orders on exchanges utilizing the "maker-maker" system, as opposed to the "specialist system", of executing orders.

Open Order: An order to buy or sell a security at a specified price, valid until executed or canceled.

Open Order: An order to buy or sell a security at a specified price, valid until executed or canceled.

Open Order: An order to buy or sell a security at a specified price, valid until executed or canceled.

Open Order: An order to buy or sell a security at a specified price, valid until executed or canceled.

Market Not Held Order: Also a market order, but the investor is allowing the floor broker who is executing the order to use his own discretion as to the exact timing of the execution. If the floor broker expects a decline in price and he is holding a "market not held buy order", he (she) may wait to buy, figuring that a better price will soon be available. There is no guarantee that a "market not held order" will be filled.

Market Order: An order to buy or sell securities at the current market. The order will be filled as long as there is a market for the security. A market order is to be executed immediately at the best available price, and is the only order that guarantees execution.

Market Not Held Order: Also a market order, but the investor is allowing the floor broker who is executing the order to use his own discretion as to the exact timing of the execution. If the floor broker expects a decline in price and he is holding a "market not held buy order", he (she) may wait to buy, figuring that a better price will soon be available. There is no guarantee that a "market not held order" will be filled.

Market Not Held Order: Also a market order, but the investor is allowing the floor broker who is executing the order to use his own discretion as to the exact timing of the execution. If the floor broker expects a decline in price and he is holding a "market not held buy order", he (she) may wait to buy, figuring that a better price will soon be available. There is no guarantee that a "market not held order" will be filled.

Market Not Held Order: Also a market order, but the investor is allowing the floor broker who is executing the order to use his own discretion as to the exact timing of the execution. If the floor broker expects a decline in price and he is holding a "market not held buy order", he (she) may wait to buy, figuring that a better price will soon be available. There is no guarantee that a "market not held order" will be filled.

Fill Order: An order that must be filled or canceled immediately.

Day Order: A type of option order which instructs the broker to cancel any unfilled portion of the order at the close of trading on the day the order is first entered.

Contingency Order: An order to execute a transaction in one security that depends on the price of another security.