DAY = 0; GTC = 1; GTX = 2; CLO = 3; OPG = 4; IOC = 5; GTD = 6; OTHER = 7

Day: Expiration is set for 24 hours after order submission

GTC: Good Till Cancel Order. As the name suggests, this type of order will theoretically stay live forever until canceled or filled

GTX: An order to buy or sell that is canceled prior to the market entering into an auction, or crossing phase. Typically, markets that support continuous trading will have an auction phase at the beginning and sometimes also at the end of trading to match up orders that have been entered into the exchange's order book during the pre- or post-trading phase (i.e. where no continuous trading was available). A GTX order automatically expires immediately prior to the commencement of a crossing session, i.e. the party originating the order wants to make sure it gets filled during the current continuous auction, and any remaining open quantity should be discarded at the end of the current continuous auction period

CLO: Closing order. Commonly known as MOC i.e., a non-limit market order, which is executed as near to the closing price as possible- either exactly at, or slightly after the market close

OPG: Opening order. Commonly known as MOO i.e., an order that will be executed at the day's opening price.

IOC: A market or limit-price order that is to be executed in whole or in part as soon as it is placed. Any portion not executed immediately will be cancelled

GTD: Good Till Date order. User must specify the expiration date in the field ExpirationDate in order to place a GTD order

OTHER: Any expiry type that is not mentioned above, but is present on EMS