Hi Petko,
I have no doubt you are a busy person!
The video I mean is the one in which you kindly offered to explain the intricacies of the Reactor, now that it has so many ways to use OOS and Walk Forward. It was in this post from earlier in this thread – https://platform.algotradingspace.com/forums/topic/forex-strategy-course-portfolio-trading-with-12-expert-advisors-questions/#post-17895