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How is edge calculated? How is edge calculated?

01-20-2012 , 01:44 PM
In sngwiz when I do a HH review the edge value varies from hand to hand. How does wiz come up with this value?

Is it a good idea to set this value to zero if we want to see how wide our range can be or should it be left as wiz calculates?
How is edge calculated? Quote
01-20-2012 , 05:01 PM
I don't know how sngwiz defines edge but here are what I think are standard defs.

Four equivalent edge definitions:
• Edge is EV/I, expected value divided by investment or bet amount. If the investment amount is one unit, then edge is equivalent to EV.

• For an even money payout (1 to 1 odds payoff), edge is win probability – lose probability.

• For a non-even money payout, edge is odds payoff * win probability – lose probability

• For a tournament, edge is equal to ROI.

I’ll use roulette to illustrate how edge works. Consider the American system where a roulette wheel has two zeros plus 36 numbers. If you hit a number, the house pays 35 to 1. Without the two zeros, that would be a fair bet but the two zero’s give the house the ‘edge’. How much edge? Let’s use the basic formula, edge being EV/I. Say you bet $10 on your birthday number. If you hit, you win 35 times your bet or 350. If you lose, you lose your $10.

EJ = EV/I

EV = Pr(Win) * Payout - Pr(Lose)*Bet
= 1/38 * 350 - 37/38 * 10 = -0.5263.

This says that for each ten dollar bet you make, you can expect to lose 52.6 cents. The edge is then

EJ = -0.5263/10 or -5.263%

If we use the equation, EJ = odds payout * Pr(Win) – P(Lose), we have
EJ = 35 * 1/38 – 37/38 = -5.263%.

What if you bet one dollar on red where the payout is 1 to 1. Here P(win) = 18/38 so,

EJ = 18/38 * 1 + 20/38*(-1) = -5.263%.

The house got you any which way.
How is edge calculated? Quote
01-20-2012 , 07:26 PM
Quote:
Originally Posted by statmanhal
I don't know how sngwiz defines edge
I found some general default edge models in sng wiz based on position and chip stack

Thanks for your reply!
How is edge calculated? Quote

      
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