Awesome thanks!

Two approaches:

Cool thanks.

@Oot42

Is there a way to have if so if a negative value is entered the background bar goes red and fills?

The template:

https://sims.fandom.com/wiki/Template:RelationshipBar

I'm not exactly sure what you mean with "red and fills".

You mean any negative value leads to the whole bar turning red?

Basically, what was a green bar fill, on negative would be the same value but red. If that makes more sense.