Both are derived from the same input: the open interest sitting on a stock's option chain. Both produce price levels. They frequently disagree, and the disagreement is informative rather than a sign that one of them is broken.
What each one measures
Max pain is a payout minimum. For every listed strike, add up what all open calls and puts would pay out if the stock settled exactly there. Max pain is the strike where that total is smallest — the settlement price that hands option holders the least money.
It is a property of the whole ladder. Every open contract contributes, weighted by how far in the money it would finish.
Gamma walls are hedging concentrations. Dealers who sold those options hedge continuously in the underlying, and the strikes where that hedging is heaviest behave like magnets: the put wall below spot where dealers buy into weakness, the call wall above it where they sell into strength.
These are properties of individual strikes, weighted by dealer gamma rather than by payout.
| Max pain | Gamma walls | |
|---|---|---|
| Unit | One number for the whole chain | Several levels around spot |
| Weighted by | Payout if settled there | Dealer gamma × open interest |
| Mechanism | None directly — it is an accounting result | Dealer delta-hedging flow |
| Strongest when | Near expiration | Any session, strongest near expiry |
| Tells you | Where the least option value pays out | Where hedging flow concentrates |
| Moves when | Open interest changes | Open interest or spot changes |
Why they disagree
Three reasons, and each one is worth recognising.
Max pain pools every expiry; walls are usually read near-term. A stock with heavy LEAPS positioning can have a max pain a long way from spot, driven by contracts expiring in eighteen months that have no bearing on this week's hedging.
Max pain is payout-weighted, walls are gamma-weighted. A deep in-the-money strike with large open interest moves max pain substantially, because it would pay out a lot. It contributes almost nothing to gamma, because deep ITM options have very little of it. The two weightings emphasise opposite ends of the chain.
Gross versus net. This is the one that separates good wall data from bad. Summing the magnitude of gamma at each strike treats dealer-long and dealer-short positioning as if they were the same thing. They are not — they produce hedging flow in opposite directions. Selecting walls on net gamma rather than gross changes the answer materially: on our own data it moved put-wall agreement with an independent provider from 40.8% to 74.6%, and from 3 of 7 to 7 of 7 across the largest tech names.
If a wall number does not say whether it is net or gross, that is worth knowing before you trade off it.
A worked disagreement
Ticker trading at 228
Max pain 190 pooled across all expirations
OI call wall 230 heaviest call OI above spot
Net-gamma call wall 230 agrees — this one is real
OI put wall 170 heaviest put OI below spot
Net-gamma put wall 190 disagrees — gross OI is misreading it
The call wall agrees across methods, which raises confidence in it. The put wall does not: raw open interest points at 170, the net-gamma read points at 190. Those imply very different downside support, and only one of them reflects the direction dealers actually hedge.
Max pain landing at 190 alongside the net-gamma put wall is a coincidence worth noticing but not over-reading — they got there by different routes.
Which to use, and when
Use max pain when you want a single reference for where the chain's dead weight sits, especially in the final week before a monthly expiration. It is most meaningful when one expiry dominates the open interest.
Use gamma walls when you want to know how a name is likely to behave — whether moves get damped or amplified, and where. The hedge wall in particular has no max-pain equivalent: it marks where dealer positioning flips from suppressing volatility to accelerating it, which is a statement about the character of the coming sessions rather than about a price.
Use both when they agree. Two methods with different weightings landing on the same strike is a stronger signal than either alone.
How each behaves into expiration week
Both effects strengthen as expiration approaches, for different reasons.
Max pain's pull concentrates because the contracts that dominate the calculation are the ones about to settle. Two weeks out, a monthly expiry's max pain competes with several other expiries in the pooled number. On the Thursday before, that expiry is most of the open interest that still matters, and the level sharpens.
Gamma walls get steeper because gamma itself rises as time decays. The same open interest produces far more hedging flow per point of underlying movement on expiry week than it did a month earlier — which is why a wall that price drifted through in early June can act like a hard ceiling in late June with no change in positioning at all.
The practical read: a wall level that has been ignored all month is worth re-checking in the final week, because the level did not change but its force did.
Three common mistakes
Treating max pain as a price target. It is where the least option value pays out, not where anyone is trying to push the stock. Positioning changes daily and the level moves with it.
Reading a gross-gamma wall as though it were net. Covered above, and worth repeating because most freely available wall data does not disclose which it is. A gross read pools dealer-long and dealer-short positioning as if the hedging pointed the same way, which it does not.
Ignoring what happens when they disagree. A disagreement between the payout-weighted and gamma-weighted reads usually means the open interest is concentrated somewhere unusual — heavy deep-ITM positioning, or a single large expiry dominating the pool. That is information about how the chain is built, and it is worth understanding before trading either number.
What neither one is
Neither is a forecast. Max pain describes where positioning is dense; a genuine catalyst overwhelms it entirely and the level itself moves as open interest rebuilds. Gamma walls describe where hedging flow concentrates; that flow is real, but it is one participant among many and it does not outvote news.
They are maps of where other people's money already is. That is useful, and it is not the same as knowing where price is going.
Compare both on any ticker — max pain from the full open-interest ladder, and gamma walls weighted by net dealer gamma.
See where price sits against the walls today on the screener.
Check a specific trade against the current levels with Trade Check.
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