Filter on Year and display Year-1 Key Figures on chart ?

Hello everyone,

I have an issue on Design Studio but i don't know if it's due to my lack of skills or if it's possible to do this on Design Studio.

Here the problem :

First, users can select a year with a dropdown to filter datasource.

Then, I want to display on a same chart this keyfigure : growth quantities sales for selected Year, Year-1 and Year-2.

In BEx Query, i have no issue. I can select a year and i can see data for selected Year (N), N-1 and N-2

But on Design Studio, if i select 2015, i can see only data for this year. If i select N-1 or N-2, there is no display on chart.

So, i missed something or if i have a filter on year, Design Studio is not able to find data for N-1 and N-2 ?

Thank you all for the help.

Jonas.

PS : Design Studio version 1.5