I’ve had an idea for a feature suggestion which I feel could be interesting.
With practice accounts, you can practice trading using current market prices and using simulated prices on weekends.
How about a feature which allowed you to trade using historical data which Trading212 has?
As a user, I could go to reset my account and set the options of:
Reset Balance to £1000
Set Start period to 2018-04-04 08:30 utc
This would then allow you to see how you could have made a profit/loss at the time.
You could also allow people to “skip” time. eg. by hourly, daily or weekly.
To reduce data requirements, you could have these times only available on a minute chart rather than tick chart.