It is due to the way it works. When you use OOS, the Generator literally cuts off the OOS zone of the data and searches for a strategy. When the generation process is completed, the Generator loads the full data set and recalculates the strategy. It is able to show the OOS zone because it has both backtest stats.

During the generating it pushes strategies to the collection together with their backtest stats. When you use OOS, the collected strategies has only the in-sample part of the data and the Collection has no possibility to show the OOS part.

I'm sorry for not unclear question.
But,I mean fsb pro.

Now go back to the collection and click in Recalculate.

Did it works?

I need to compare out of sample from many strategies at the same time.

How to do that?

Thank for advance