Indeed, modifying the number gauges, like we do for graphs, is on the todo list. I’m just in transit and your post made me thing - it’ll be quite cool if you can set a min/max level where it can alert you by, for example, changing the color of the number of background. I’ll add this to the list.
In terms of the range, I have good news, just long-press on the color scale. This is in beta so it might change in the future.
Cheers, Duane.