In Dashboards, just select options, Chart Formulas. For more detail on any formula, click into the box.  It will reveal increasing amounts of detail.  You can also review a list of available metrics and formulas in Settings (top bar)>Metrics library (left sidebar).  This will reveal an alphabetical list of available metrics and formulas.  Use the searchbar to find the one that you want. You can read more here in this artlce @defi