Not quite sure what you've done there. Again, as with your other figures I guess we can move the decimal point one place to the left to get a real points advantage.

Those figures look wierd though. I assume you must have simply worked out how much better a team performs at home than away. That is not really home ground advantage and I'll tell you why. Port Adelaide has a very good home ground advantage, yet they have the lowest figure you've listed there. I guess that's because they have a very good away record and that must have skewed your figures.

In any case, when the Melbourne teams play each other, on most occasions there's NO real home ground advantage. The real home ground advantages come when teams have to travel interstate.