If you have an Invest account or an ISA on our platform, you probably have noticed 'GTC' as an expiration option for your Limit, Stop or Stop/Limit orders.
GTC stands for 'Good til cancelled', and unlike the other expiration option 'End of Day', your pending order will remain such until it's either executed by our platform or cancelled from your side.
Note: A GTC order will expire on the last trading day of the quarter following the quarter in which it was placed. For example, when you create a GTC order in January, if its target price is not reached by the last trading day of the following June, it will be cancelled by the system.
With the 'End of Day' option, the pending order will be automatically cancelled by our platform if it's not executed by the end of the trading day. 
Note: As of 20/09/2021, accounts registered under Trading 212 Markets Ltd. will have the option to choose between 'End of Day' or 'GTC'. Already existing 'End-of-week' orders will expire at the end of the following week if their price is not reached.