Indifference point
Also: indifference, making indifferent
A bet size or frequency at which an opponent's options are worth exactly the same — calling and folding have identical expected value. Equilibrium strategies are built out of these points, because a player made indifferent cannot exploit you by choosing either one.
The familiar example is river bluffing frequency. Bluff at the right ratio relative to your value bets and a bluff-catcher breaks even whether it calls or folds; bluff more and calling becomes profitable, bluff less and folding does. The same idea underlies minimum defence frequency on the other side of the bet.
Indifference is a defensive concept, not an aim in itself. Against an opponent who folds too much, the point is to leave equilibrium behind, not to make them indifferent.
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Full glossaryFrequently asked questions
Why would you want an opponent to be indifferent?
Because then neither of their options beats you, so they cannot exploit your strategy whichever they choose.