BI Designer

Hello,

Is there a simple way to apply multiple data sources into one BI Blend Dashboard Graph? For example, a bar graph that compares Actual sales to PY. 

I am running a SQL script to return data for my data adapters. I've added them as components to my BI Viewer, and can select one or the other under the "Data Source" drop down. I just can't manage to get both sets of data into one chart. I know this is feasible but think I am missing something.

Thanks!