I'm working on an NBL system of power ratings.

Taking the ladder position last rnd and dividing by the wining margin and adding the no of games the team one agianst their opponant.

E.G. Syd Kings ladder position is 2 and the won their last game by 10 pts

Syd Kings 2/10+6 = a power rating of 6.2
Melb Tigers 10/15+4 = a power rating of 4.6

I'm still fiddling around with it.

Benny