To be making positive progress against a hardship or challenge.
This can both be used to compare directly to the ideal state you're intending to reach or compare against within a challenge, or can be used to compare against a previous state you held when striving against the same challenge in question.
1: Are your health problems still bothering you?
Yes, but I'm pulling positive for the most part.
2: How are you doing on your homework? Think you'll get it done in time?
I had a delay when friend called, but I'm still pulling positive.
3: How are you doing at improving your racing time?
Still not where I want to be, but I'm pulling positive.