Interactive Chart (Two Values via Drop Down)

I am trying to chart two different values/metrics on the same chart, and customize the chart labels and chart title.

First, I was hoping to get some help getting both sets of data to show up on the chart. I cant figure out where the issue is within the name manager.
Secondly, I was hoping to change the data labels on the chart from the Market Name in the drop down to the Metric Name (i.e. Page views and signups)
Third, I wanted to get the Market Name (from the dropdown) to dynamically show up as the chart title.