On the presented screenshot I got names from A up to J as a dimension, and several expression - one expression for each entry in the legend. What I would like to achieve is: when I click on the green bar, so Screened - it filters out the name on which bar I've clicked. So if I click on 2nd green bar, it would filter B and all the entries (Screened, Eligible, Consented, Enrolled). I would like to let it filter green bars (Screened) for all names in dimension, so screened for A-J
Is it something to achieve in my setup? Each expression comes from different variable
Expressions aren't selectable on it's own else only dimensions. If you click within the chart you will select the dimensions behind the expressions. Therefore I believe your mentioned selection-logic is rather not possible with your approach. Instead of it you may try it with a second dimension - ideally from the script but you may also try it with a calculated dimension.
