Name	Nature	Description	59/TimeInForce	168/EffectiveTime	126/ExpireTime	1629/ExposureDuration
Immediate or Or Cancel	Aggressive	The Order must be executed immediately, at least in part (Partial fills are allowed), otherwise the Order is cancelled. AKA 'Fill and Kill'.	IOC	Optional	-	-
Fill Or Kill	Aggressive	The Order must be executed immediately, in full (no Partial fills), otherwise the Order is cancelled.	FOK	Optional	-	-
Good For Auction	Resting	TODO	GFA	Optional	Optional	Optional
Good For Day	Resting	The Order expires automatically on close of the trading day, if it is still unfilled.	DAYGFD	Optional	Optional	Optional
Good 'Til CanceledFor Time	Resting	The Order remains active until it is either executed or cancelled. NOTE: Maximum possible duration is one trading week, but is equivalent to DAY for most Venues that reset daily.is active for a specified duration. TODO TWAP?	GFTGTC	Optional	--	Mandatory
Good 'Til Date	Resting	Order is active until a specified time. TODO TWAP?	GTD	Optional	Mandatory	-
Good For Time'Til Canceled	Resting	The Order is active for a specified duration. TWAP?remains active until it is either executed or cancelled. NOTE: Maximum possible duration is one trading week, but is equivalent to DAY for most Venues that reset daily.	GTCGFT	Optional	-	Mandatory-
At Market Open	Resting	TODO	OPNAMO	Optional	-	-
At Market Close	Resting	TODO	CLSAMC	Optional	-	-	Good For Auction	Resting	GFA	Optional	Optional	Optional

Order Types

There are three broad categories of OrderType:

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