BO Design studio Chart Component issue ...!!

Hi Community,

I am getting some problem in chart.

please help me for that issue i mention below.

I created a Chart, based on that member selection i did some calculation, and shown in a text box..

so while selecting other member it showing same result... (its not changing)

And when i m deselect one member its showing value....

So my Question is this there is any possibility like that clicking on a member will get value..?? (without deselecting another member)

Thanks for your help

Anshul