BusinessObjects Board

Lumira Designer:How to Filter a Chart by a Listbox?

Hello All,
My Lumira Designer dashboard has a list box component which displays countries populated by DS_1. Dashboard also has a chart showing sales in countries populated by DS_2. I need to filter the chart with what the end user selects in the list box. So if end user picks Mexico, the chart should show sales for only Mexico. Please note, both DS_1 and DS_2 are coming from the same universe.