1. #1
    Nuggz
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    Join Date: 04-28-10
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    Newbie: EV calculation question

    Hey I've been betting for a few years but just got into handicapping and relative-value betting, trying my best to find positive EV in bets. Here's my question:

    Say I develop a formula that I think accurately predicts the probability of a given team to WIN a game.
    Once I have this percentage, is there any way to convert it into an accurate point-spread instead of just money-line? Additionally, if I can arrive at what I think is a 'superior' line for the game, (lets say 50% chance of winning and losing) how can I find my win percentage when betting on the books' inferior line.

    Of course I'm not so confident in my handicapping that I think my lines are superior, but for the sake of calculating EV how can I find my expected win%?

    Thanks

  2. #2
    suicidekings
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    Join Date: 03-23-09
    Posts: 9,962

    The general equation for EV (based on laying -110 to win 100) is:

    EV = 100*p - 110*q

    where p & q represent the probabilities of an event winning (p) or losing (q).

    From there, if you're trying to compare a point spread to a probability of winning SU, you need to know the value of each half-point (push probabilities) which you can obtain from historical data (margins of victory). Take a look around the Think Tank and you'll likely find this topic addressed already.

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