Order Types

Market
An order to be executed immediately at the current market price.
Limit
An order that can be executed only at a specified price or better.
Day
An order that automatically expires if it is not executed on the day it is entered.
Open
An order that remains in force until canceled or until the contract expires. This also is called a “good-‘till-canceled” order.
Spread
An order to simultaneously buy one contract and sell a different contract at a quoted differential, sometimes three or more “legs” are involved.
Stop
An order that becomes a market order only when the market trades at a specified price; also called a “stop-loss” order.