Total Calls Metric in Dashboards

Hi,

I'm trying to create a Transaction Scorecard pie chart with the data from the main dashboard with the same name. However, there does not seem to be a metric that is "normal calls". There's a calls/minute, and there are metrics for Slow/Very Slow/Stall, but no value for normal.  Has anyone had success in representing the percentage of calls by type, including Normal?

Thanks,

Jeremy