Worst-case devig

Worst-case devig is a conservative approach to estimating fair sportsbook odds. Run multiplicative, additive, and power devig on the same market; return whichever gives the worst (least favorable) fair price for the bettor. Any bet with positive edge against the worst-case price has positive edge against every common method.

The problem it solves

Different devig methods produce different fair prices, especially on heavy favorites. A bet that looks like +2% EV under multiplicative devig might be -0.5% EV under power devig. If you only run one method, you don't know which side of zero the true edge is on.

How it works in practice

For each market, run all three devig methods. For each outcome, take the highest fair odds (most conservative for an underdog bet) or the least negative (most conservative for a favorite bet). Compare the soft sportsbook's offered price to that worst-case fair price. The resulting edge is the smallest of the three method-specific edges.

What you give up

Some genuinely +EV bets get filtered out because one of the three methods disagrees. This is the explicit trade-off: fewer false positives at the cost of some false negatives. For bettors who care more about not betting -EV than about maximizing volume, worst-case is the right default.

Why EvqBet uses it by default

A wrongly-flagged +EV bet costs you money and erodes trust in the tool. A missed +EV bet costs you the opportunity but nothing else. The asymmetry favors caution. EvqBet runs worst-case devig on every market and surfaces the resulting edge — never a single-method "best case" number.