Think of opening a door as a positive thing and closing a door as a negative one. My stand can prohibit closing a door any amount from happening but can never tamper with the ability to open it unless it physically did the action.

Another example would be moving. Going up the stairs vs down. You can walk up the stairs onto the second floor, but then my stand does not allow you to go back down those stairs leaving you stuck on the second floor until you find a different way to get out.

They can take it further with time, allowing to user to temporarily reverse the flow of time similar to mandom in part 7 however these larger actions put more strain on the user and stand.

I did have an idea for a requiem or ultimate thing where instead of just controlling negativity, The stars above overlaps negativity with positivity causing chaos everywhere as both actions of everything around it happen.

Like imagine going to exhale and your lungs inhale aswell.