question for ganchrow

[NYER5680]

You gave me some advice the other day,again thanks for the help. I have another question. I want to make sure i am doing it correctly.

edge=win_%xdecimal_odds-1

which is the coorect % to use?


cubs -129 =56.33 win %
giants+119= 45.66 (from odds calculator), or


cubs-129=56.33win%
giants+119=43.67win% (100-56.33)

sorry if dumd ? just trying to get the math right

thank you.

[Ganchrow]

Cubs -129 => 56.332% / (56.332% + 45.662%) ≈ 55.231%
Giants +119 => 45.662% / (56.332% + 45.662%) ≈ 44.769%

Implying a player edge of -1.955% (i.e., 1.955% juice).

See:

http://forum.sbrforum.com/handicapper-think-tank/11994-introduction-betting-lines-percentages.html

-and-

http://forum.sbrforum.com/handicapper-think-tank/12142-introduction-expectations-theoretical-hold.html