Dealer gamma, drawn on the chart.

GEX (gamma exposure) levels are strikes where options dealers carry large gamma. Around big positive-gamma strikes dealers hedge against the move (buy dips, sell rips) — price tends to pin. Around big negative-gamma strikes they hedge with the move — price tends to accelerate. The largest positive strike above spot is commonly called the call wall, the largest negative strike below spot the put wall.

From tickstream's own realtime feeds: the live QQQ option chain (every strike with gamma and open interest) and the live NQ future price. Nothing is scraped or delayed — it is the same data our paying API subscribers stream, computed server-side and refreshed continuously.

Dealer hedging concentrates in the big ETF options — QQQ for the Nasdaq-100, SPY for the S&P 500, GLD for gold, SLV for silver, USO for crude oil. The open interest there dwarfs options on the futures themselves, so those surfaces are where the actual hedge flows live. We compute GEX per ETF strike and map it onto NQ / ES / GC / SI / CL through the live price ratio.

Yes — switch the FUTURES / STOCKS tab above the chart to STOCKS for single-name equities: AAPL, NVDA, TSLA, AMZN, META and MSFT. For a stock the GEX is computed directly on that name's own option chain (no futures mapping — the price level is the strike), with the same non-naive method, OI/volume lenses, 0DTE filter and vanna/charm greeks as the futures. Want another ticker? Use the request button.

Probably — if a liquid options surface exists for it, we can wire it up. Use the 'request other GEX levels' button on the page (or mail [email protected]) and tell us the future or ETF you trade.

Non-naive, in both places it matters. Naive GEX evaluates every strike's gamma at today's spot — distant strikes then show near-zero gamma and the walls glue themselves to wherever price happens to be. We evaluate each strike's gamma at the strike itself (Black-Scholes, using each contract's own implied vol and time to expiry): its hedging force when price actually trades there. The zero-gamma flip is likewise root-found on the spot-parametrized net-GEX curve rather than read off a strike-cumulative sum.

Two extra levels drawn from the same gamma profile. The HVL (high-gamma level, amber) is the single strike carrying the most absolute dealer gamma — the magnet the market tends to gravitate to and pin around intraday; it often sits at or just inside a wall. Blindspots (cyan) are the strongest secondary gamma peaks between the walls, one above and one below spot — reaction levels that aren't the obvious wall but where hedging still clusters. Both are computed on our own surface and are conceptually similar to the levels of the same name from other gamma vendors, not identical numbers.

No — they are context. Our own backtests show level-based entries alone don't carry an edge after costs; what survives testing is using the gamma REGIME (positive vs negative) to size and to know when moves tend to pin versus accelerate. One of our live strategies, Riptide, trades exactly that regime — its track record is public.

Open interest is standing positioning: every contract still open, i.e. where dealers are already hedged. Volume is today's flow: the contracts that actually traded this session, i.e. where positioning is being built or unwound right now. The OI lens tells you which walls exist; the VOLUME lens tells you which ones today's flow is reinforcing. They often agree — when they diverge, volume is the earlier signal. Toggle WEIGHT above the chart to switch lenses; every level, wall, flip and greek recomputes on the selected weight.

Yes. The EXPIRY toggle filters the whole page to 0DTE (expires today), 1DTE (tomorrow) or all listed expiries. 0DTE gamma is where the intraday pin-and-fuel action concentrates on index products — isolating it strips out the longer-dated open interest that doesn't move today's hedging. Walls, flip, the histogram and the net regimes all recompute for the chosen expiry group.

They're the other dealer-hedging greeks beyond gamma, shown as net regime chips. DEX (delta exposure) is the directional hedge pressure at spot. Vanna is how dealer delta shifts when implied vol moves — it's why a vol crush can drift price without any spot trigger. Charm is how dealer delta decays purely with the passage of time — the quiet force behind classic end-of-day pins into a big strike, especially on 0DTE. Gamma tells you where price sticks; vanna and charm often explain why it drifts there into the close.

A what-changed view, not just a snapshot. We keep a rolling record of per-strike gamma through the session and flag the strike where dealer gamma moved the most over the last ~30 minutes — i.e. where positioning is actively repositioning, adding pinning (positive) or fuel (negative). A static GEX picture shows where the walls are; this shows where they're being built.

Yes. No signup, no email, no trial clock. It is a permanent free tool built on the same infrastructure we sell API access to — if you want the raw chain (all strikes, greeks, open interest, volume, realtime) or the tick feed behind the chart, that is what the API plans are for.