How Min Max Avg are actually calculated by Widgets

The Gauge widget is a bit of an odd case - if in Gauge mode, it will always show the current (most recent) value of a datapoint. In this case, the min, max and average setting doesn't make a difference.

If you switch to Sparkline mode, so you see a history - then it matters. (Each point on the graph, which represents multiple data samples, will be the minimum (or max, or average) of all the samples represented by that one graph point.)