Say whether WIS is better when larger or smaller

[capnrefsmmat]

The text in wis.md says

The weighted interval score (WIS) is a proper score that combines a set of interval scores. As described in this article it “can be interpreted as a generalization of the absolute error to probabilistic forecasts and allows for a decomposition into a measure of sharpness and penalties for over- and underprediction.”

But, as a first-time viewer of the dashboard, what I want to know is: Are forecasts better if the WIS is larger or if it's smaller?

I'd even stick "Smaller is better" (or whatever) in the WIS plot subtitle or caption or something.