How do I use another field's value in Report Criteria?

How do I use another field's value in Report Criteria?

I'm trying to build a report on Pipeline movement. I want to generate a report of all the changes to the Stage in each Potential. I figured I would add a criteria in the report where Stage != Stage History and get the report. However, I can't seem to figure out how to use the current record's fields in the values of the criteria. I can do things like ${TODAY} and ${CurrentUser}.  How do I get the current record's fields?