Alan, thank you very much.
It is a very detailed answer and now I understand perfectly how these things work. I will also try to test directly on the real account with 0.01 lot to find the top performers.
But I also want to test the robots for longer periods of time, so I need to test with the Strategy tester module.
By the way, do you know if FTMO demo account and FTMO real account use the same server with the same historical data?
But, in fact, the meaning of my question was slightly different. My chosen broker (of my prop firm account) does not have a demo account. That’s why I test the robots in the Strategy Tester module, directly on the challenge account I trade on, so historical data should be the same. In this case, the results from the Strategy tester should be identical to the ones I would have obtained if I placed the trades on the account at that time? Because I’m testing on the same account.