nonmonotonic bright red line in goal

What are some examples of when someone would want a nonmonotonic bright red line in their goal? (Where the bright red line slopes first up and then down, or first down and then up.)
I recently did this by accident, and was surprised to learn that some people do this intentionally…


The only example I can think of offhand is my weight goal:

I know there are a couple of folks who use non-monotonic goals to mind backlogs which can build up at certain times and then have to be dealt with, in cycles.

I suppose my clockoff goal is non-monotonic because it’s not cumulative, as another example. (It has steps rather than slopes, but still, the bright red line can be adjusted both up and down over time.)