ES Futures Max Pain

Max pain is the OI-weighted settlement strike where total option holder intrinsic value is minimized at expiration - the strike at which dealers and option sellers collectively lose the least money. For ES it is computed on the E-mini S&P 500 options-on-futures chain (not SPY/SPX relabeled). Many traders use it as a magnet for expiration-day price action.

Max pain is a probabilistic tendency, not a guarantee. It works best when (1) pin probability is above 60, (2) dealer alignment is converging (max pain near gamma flip and between walls), (3) gamma regime is positive, and (4) there's no major catalyst before expiration. Because ES trades nearly 24 hours on CME Globex, positioning can shift overnight. For ES these conditions can be checked above using the dealer alignment card.

For each candidate settlement price K, you sum the intrinsic value across all open call and put contracts on the ES future: Pain(K) = sum of max(K - K_put, 0) * OI_put + sum of max(K_call - K, 0) * OI_call. The OI-weighted strike that minimises this total is max pain. FlashAlpha computes this live across all ES options-on-futures expirations and surfaces it via the Max Pain API.

Max pain is based on open interest and minimises total option payouts at expiration. Gamma flip is based on OI weighted by gamma and the spot price - it marks where dealer hedging behavior changes from supportive (positive gamma) to amplifying (negative gamma). For ES, dollar gamma uses the CME index-point multiplier rather than the 100x equity multiplier. When ES's max pain and gamma flip converge, the pin signal is strongest because both forces point to the same level.