After 2 years of research on the NBA and MLB and the NHL, I have come up with a selection method for picking the right games to bet on and taking them in 2 team parlay's.

Now for the next stage which is to be able to bet and make a profit, therefore I need an excel formula to work the amount to stake.

Here's an example parlay.

NHL: Ottawa
MLB: L.A. Dodgers vs NY Yankees

So the bet would be

Ottawa into L.A. Dodgers
Ottawa into NY Yankees

The formula will work out the correct stake.