What is a valid order before expiration?

GTD means "effective until expiration" and is a term that remains in effect until a specified date unless it has been fulfilled or canceled. Order type.
If not executed, all orders are canceled at the end of the trading day specified in the order, so valid orders before expiration are used to cover the longer period.
Where have you heard of a valid order before expiration?
Valid pre-maturity orders are usually used by long-term investors to buy or sell a large number of securities at a specified price.
What you need to know about valid orders before expiration...
Instead of placing the same order every day, you can use a valid order before expiration to keep your order valid until a specific date.
It is a condition-based order, meaning that it can only be fulfilled when your set parameters (usually reaching a specific price) are met. Otherwise it will expire on the specified date.
Typically, a valid order before expiration is valid for a maximum of 90 days.