You may already know about this, but if not, here’s one way that’s very fast and easy to get Grafana
to show min/max values, albeit not as part of a bar on a chart.
The Show, As Table, To the Right, Min and Max checkboxes are the pertinent controls.
I run an older version of Grafana. (v5.4.5) This will be different if you’re running a newer version,
but the checkboxes have the same names and do the same thing.