Automated candidate notification when their requisition-specific candidate status changes

Summary

Automated candidate notification when their requisition-specific candidate status changes

Content

Hello,

I want to improve our candidate experience by notifying our candidates every time their requisition-specific candidate status changes. I know where I can activate a notification and how to create a system email template.

My first question has to do with the requisition-specific candidate status field. I cannot find the RSCS field in the drop-down list of available fields when I edit a system email template. There is a field called "Status change" but I'm not sure what that field is. 

My second question - is it possible to use the "C