Translation woes

Hi all,
I’m doing a bit of translation tonight, and one of the new strings is “follow output peak”. I can’t find it anywhere in the darktable UI, but it seems to be in the suorce files “build/lib/darktable/plugins/introspection_agx.c” and “build/lib/darktable/plugins/introspection_sigmoid.c”.

I could always translate it literally word by word, but it would be better to know what it actually means. What is the context?
Can anybody shed some light on this for me?

Thanks.