Hmm, per http://docs.splunk.com/Documentation/Splunk/latest/Viz/PanelreferenceforSimplifiedXML#single_.28even... it does seem like $row.___$ should be available - I'll keep investigating.
Hmm, per http://docs.splunk.com/Documentation/Splunk/latest/Viz/PanelreferenceforSimplifiedXML#single_.28even... it does seem like $row.___$ should be available - I'll keep investigating.