Counting last (most recent) consecutive positive or negative numbers in a row

I am trying to keep track of the current standings for a fantasy football league. I want to track the current winning/losing streak for each team.

Therefore I need to count the consecutive positive numbers going backwards from the most recent date for wins, and the same thing going backwards for losses.

I've included a worksheet with some sample numbers and what the outcomes should be in the cells. The positive numbers are how much a team won by, the negatives are how much they lost by.

Thanks,
Damian