Okey so regardless the size of their economy i can use Russia as a bench for Morocco , and for the data i have access to bloomberg i could extract the data . I was just asking for the first step to do after extracting EURRUB and USDRUB data and how many years of data i should take (time horizon of the study )I think you're misunderstanding me. I was just recommending that you look at what happened to EURRUB and USDRUB currency volatility after Russia lifted a similarly managed currency basket. It's the closest comparable you've got, and it's recent and has a lot of available data around it. Obviously they aren't the same country and their economies are different, but the way their central banks managed their currencies is similar.