Here is something that I learned yesterday!
When I run the generator I normally look for higher Profit Factor, and other criteria that are expected to be high in the future.
But actually the key point is the number of trades.
Petko shows in the courses with min 300 count of trades, but this is because the courses are meant for beginners.
If you want to build robust strategies that perform well for a longer time, you need to look for the maximum count of trades.
This depends on the Historical data of the broker.