Link expression of a chart with elements of list box

[Aymeric_bolazieur]

Hi everyone, 

I would like to connect one expression of my chart with elements of the list box. 

For example : 

In my listbox I have 3 items : Item1 ; Item2 ; Item3

I would like in the expression of my chart put a formula like : If Item1 is selected, the calculation is as follows,

If Item2 is selected, the calculation is as follows, If Item 3 is selected, the calculation is as follows. 

Can you please help me.
Thank you very much and have a nice day. 

[eddie_wagt]

Hello,

I can't follow exactly what you are trying to achieve. Standard the expressions are associated with the selections you make in listboxes (or other objects). For example; if your expression is: sum({$}Sales), then you automatically get the calculation of Item 1, 2 or 3 when selected.

Regards Eddie