How to show values of several variables of a field variable at the same plot?

I have a query which has a field variable. when I select more than one variable from drop down box it shows the total values of selected variables but I want to show the values of each variable as a different curve. how can I do that?
I tried to group by the result based on field variable but it doesn't work.

Hi @armanpanco
Post "Diagnostic Info" from Admin > Troubleshooting.
And post your query.

Thank you for your reply, I solved the problem.