Every tool below answers the same question for a different market: which prices are most likely to matter in today's session, and how often has that actually been true. We compute the levels ourselves from the live option chain, publish the method, then grade our own numbers in public after each close.
On the S&P 500, the longest-running of these tools, the record so far runs across 220 or more graded outcomes: the gamma flip has held in about 81 percent of 36 tested sessions, the call wall around 57 percent and the put wall around 54 percent, while the session references have run higher, with the prior-day high near 85 percent, the value-area high near 87 percent and the volume point of control near 80 percent. Those are the S&P 500 figures specifically. Each newly tracked symbol starts with an empty record and builds its own.
The broad-market chains, where dealer hedging flows are deepest and the levels tend to be most visible in price.
The full daily map of the S&P 500, in SPX, ES and SPY terms at once: dealer gamma levels from the option chain, the prior session volume profile, the opening range, and the public record of how often each level has held.
Open the toolNasdaq-100 positioning through the QQQ chain: call wall, put wall, gamma flip, max pain and the implied one-session range, refreshed each trading day and graded after the close.
Open the toolThe deepest option chain in the market, read as levels: where call and put positioning concentrates on SPY, the gamma flip that separates calm sessions from volatile ones, and the range options are pricing for today.
Open the toolThe same computation run on individual stock chains, where positioning is more concentrated and earnings dates reshape the picture.
Single-name dealer positioning on the most heavily traded stock option chain in the market, including the volume point of control and prior-session references NVDA tends to react to.
Open the toolWhere Tesla option positioning stacks up: max pain, the call and put walls, the gamma flip, and the value area the prior session actually traded in.
Open the toolThe tools show the numbers. These guides explain the mechanics behind them, so the levels read as market structure rather than as lines on a chart.
What dealer gamma is, how it is computed, and why it shapes where price pauses.
Why hedging flows dampen moves in one environment and extend them in another.
The two levels most traders look at first, and what they actually represent.
The claim, the mechanism behind it, and what the graded record says.
Where the prior session did most of its business, and why price revisits it.
How the option-derived levels combine with the session references.
Each session we pull the full option chain for the symbol, compute per-contract gamma from implied volatility, and aggregate exposure per strike using the standard dealer sign convention. The call wall is the heaviest call-side strike above spot, the put wall the heaviest put-side strike below it, the gamma flip the price where cumulative net gamma crosses zero, the key gamma strike the nearest strike with the largest total positioning, and the expected range a one-session band from at-the-money implied volatility. Max pain is the strike where the most option value expires worthless.
After the close we read the session high, low and close. A level counts as tested when price came within a set tolerance, held when it closed on the expected side, and broke otherwise. Untested days are excluded from the denominator. Every method is published on the individual tool pages, and the full graded history is downloadable as CSV.
Want the same structure applied to your own trades? The free AI trading journal grades your entries against these levels, and the daily market analysis walks through how they set up each session.
For research and education only. Nothing here is investment advice or a solicitation to trade. Market-structure levels describe options positioning, not guaranteed price behavior.
