for options traders
You compute dealer gamma.
We sell both halves.
The calculation, if you want the answer. The raw chains underneath, if you would rather do the calculation yourself and check ours.
Start with the free chart
The levels page is free, has no account behind it, and is not going to be taken away. Most people never need more than it. If you get to the point where something automated needs the numbers rather than your eyes, that is when the API is worth paying for.
Open the free levels page →Which half you need
- “Where is the wall in NQ right now?”the free chart
- “Size my position down when net gamma goes negative.”GEX API
- “Was that NVDA call bought at the ask or sold into the bid?”Options — trade + quote
- “Rebuild dealer exposure with my own positioning assumption.”Options chains, compute it yourself
- “Backtest a gamma regime filter over several years.”Options history · GEX from 2026-04
The last row is a real limit: computed GEX snapshots only exist from April 2026. Longer than that, you rebuild it from the chains — which is why the two products sit next to each other instead of one replacing the other.
Trading your own account is non-professional use. If a firm pays you to look at this, or your users see it, the exchange treats that differently — the arithmetic is public.
Provable gap or a wrong print in your stream? That month is free. Automatically — no ticket, no argument.
Gap history is public →Where these numbers come from
| Figure | Source | Checked |
|---|---|---|
| The free chart and the API share one code path | /api/gex-levels calls the same computation as /v1/gex — the picture and the JSON cannot disagree | live |
| Our own gamma research runs on this chain data | The GEX studies in our blog were computed from the same option chains this page sells | 2026-07 |
| Negative gamma reproduces ~40% more realised vol | 31-day intraday study on wandering levels. The same study found no level that beat its mirror placebo — the regime held, the direction did not. | 2026-07 |
| Every price on this page | pricing.config.mjs | live |
Open the free chart during a session and see whether the flip level behaves the way you would expect.
Open the levels page