The order duration determines how long your order will remain active. There are different types of order durations, including day orders, which are only valid for the trading day on which they are placed, and Good 'til cancelled (GTC) orders, which remain in effect until they are either executed or cancelled.
G.T.C. (Good 'til cancelled)
A Good 'til cancelled order is an order that will remain open until it is either filled or until you cancel it yourself. G.T.C. orders can be useful to purchase securities at a certain price point but can also be vulnerable to volatility.
Day order
Day orders are orders that will remain open until the market closes on the day the order was placed. In the case of an order placed during the weekend, the order will be open until the market closes on the first business day that follows.
G.T.D. (Good 'til date)
A Good 'til date order is an order for which the expiration will be on a pre-determined date. On Saxo's platforms, you have the option to set a G.T.D. trade for a period of one week, one month, end of week, end of month, end of year, or to set a specific date of your choosing.