What every GEX chart has in common
Gamma exposure is an estimate. No public feed tells you what dealers actually hold. Every tool has to assume who is on each side of the open interest, then add up gamma across strikes.
OptionScout's 2026 roundup describes the do-it-yourself version plainly. It assumes "dealers are generally short options that retail buys" and sums "gamma times open interest times contract multiplier across all strikes" (>OptionScout). Barchart states its own assumption on the page: above the gamma flip point, "dealers are considered net long gamma (often from calls)," and below it they "are considered net short gamma (often from puts)" (>Barchart).
Loomi.Ai uses the same framing. Our features page calls GEX "an estimate of options-dealer positioning." Treat every GEX number, free or paid, as a model output. Two tools can disagree on the same ticker.
What Barchart's free GEX page shows
Barchart is genuinely useful. According to its SPY page:
- Two views. Gamma by strike, and total gamma across calls and puts.
- Settings. 5, 20, 50 or all strikes; per 1% move or per point; volume or open interest; intraday or end-of-day.
- Default scope. "4 nearby expirations (the first 2 weeklies and the first 2 monthlies), based on a 1% move of the underlying security using gamma and open interest."
- Key levels. "The gamma flip point, and call and put wall, are based on aggregate gamma exposure across all contracts."
- Timing. Options data is "delayed approximately 25 to 30 minutes, and is updated approximately every 5-minutes throughout the trading day."
- Export. Barchart Premier members can download the data as a .csv file.
The strength is coverage: Barchart publishes these pages ticker by ticker. The trade-off is interpretation. You get the map and a clear definition of positive and negative gamma. What to do with a reading is up to you.
Other free and paid tools
OptionScout's May 2026 roundup lists several choices (>OptionScout). Keep in mind that OptionScout ranks its own free dashboard as "the strongest free option," so read that part as a vendor's view of its own product.
| Tool | Price (per OptionScout) | What it is known for |
|---|---|---|
| Barchart | Free charts; CSV export for Premier | Per-ticker GEX by strike, flip point, call and put walls |
| SqueezeMetrics | Free | Daily GEX alongside the DIX dark pool index |
| OptionScout.ai | Free | Real-time GEX dashboard with strike-level analysis |
| TradingView community indicators | Free to $15/month | Approximate GEX overlaid on your chart |
| SpotGamma | $499/year | Real-time levels, daily reports, HIRO indicator |
| Volland | About €59+/month | U.S., European and FX options coverage |
OptionScout adds a fair warning about community indicators. They "rely on delayed or approximated open interest data," so OptionScout suggests using them as "directional guides" for the general zone where gamma sits.
What the Loomi.Ai GEX Regime page shows
The >GEX Regime page is built around one reading: the sign of net dealer gamma. In the page's words, "positive means dealers trade against the move and the range holds; negative means they trade with it and levels give way."
- Up to 12 names. SPY, QQQ, IWM and GLD first, then the largest gamma names.
- Per card. Net dealer gamma in billions of dollars, spot price, the put wall with its distance below, and the call wall with its distance above.
- Three labelled regimes. POSITIVE GAMMA at +$2bn or more. NEGATIVE GAMMA at −$1bn or less. NEUTRAL between those bands, which the page treats as no-trade because "nothing in our study was measured here."
- A staleness guard. If the feed is more than 120 minutes old, the numbers are withheld: "Nothing is shown rather than a stale number."
- A wall proximity warning. Inside 0.25% of a wall is the trigger zone. Inside 1.0% is a heads-up. These are defaults you can change on the desk. The warning stands down when gamma turns negative.
What our own testing measured
The GEX Regime page publishes its study results next to their limits. The study ran on QQQ only, over 189 trading days of options data from September 2025 to June 2026.
| Finding (QQQ study) | Result |
|---|---|
| Call wall reached, all days / negative gamma days | 52% / 60% |
| Put wall reached, all days / negative gamma days | 32% / 53% |
| Share of wall touches in the first 30 minutes (call / put) | 73% / 52% |
| Put wall held on positive-gamma days | 93–95% |
| Next-day move, gamma above +$2bn vs negative gamma | About 0.6% vs about 1.0% |
| Price pinned between both walls, positive vs negative gamma days | 30.6% vs 23.1% |
The sample covers one market regime, "bull into correction." Fills were modelled on 5-minute bars. The wall-touch rates come from high and low data the site flags as possibly unreliable, so they are "indicative, not settled." None of these rates were measured on any name except QQQ.
Side by side
| Question | Barchart free GEX | Loomi.Ai GEX Regime |
|---|---|---|
| Per-ticker gamma by strike? | Yes, ticker by ticker | No. Up to 12 names, majors pinned first |
| Does it show a flip point and walls? | Yes | Walls with % distance from spot, plus a regime label |
| How fresh is the data? | About 25–30 min delay, updated about every 5 min | Live feed; withheld if older than 120 min |
| Does it tell me the regime in plain words? | It defines positive and negative gamma | Labels POSITIVE, NEGATIVE or NEUTRAL with thresholds |
| Does it warn me near a wall? | Not described on the page | Yes, at 1.0% and 0.25% by default |
| Does it publish tested hit rates? | Not on the GEX page | Yes, for QQQ only, with caveats |
| Cost | Free charts | Included in the Desk membership |
How to use it on the Loomi.Ai Desk
Use a free per-ticker chart for breadth and the GEX Regime page as a filter:
- Check the sign first. Positive gamma at +$2bn or more is the only regime where the Dealer's Hand strategy sells. Negative gamma means it stands down.
- Wait for the wall. The trigger is price inside 0.25% of a wall, and most touches in the study came in the first half hour. The page notes that after 11am "the wall trade is largely gone for the day."
- Know what is live. The regime reading and the wall warning run on the desk today. The ranked 0DTE credit-spread ladder and the losing-streak pause are in build and are not live yet.
- Keep your own system. Loomi's Desk Fit guidance calls GEX Regime "a confirmation layer, never a replacement."
The GEX Regime page, options flow, dark pool prints and the rest of the desk come with the Desk membership: $8/mo intro, then $20/mo.
Put the research to work on your Desk
Explore the tools behind the research, compare the available access, or open your Desk if you already have an account.
FAQ
Is there a free GEX chart? Yes. Barchart publishes free per-ticker gamma exposure pages with a flip point and call and put walls. OptionScout's roundup also lists SqueezeMetrics and its own dashboard as free.
Why do different GEX charts show different numbers? Each tool makes its own assumptions about dealer positioning and picks its own expirations. Barchart, for example, defaults to the first two weeklies and first two monthlies.
What does negative gamma mean? Barchart's page puts it this way: below the flip point, dealers "will sell as prices fall and buy as prices rise, amplifying price swings." In Loomi's QQQ study, negative gamma days had larger next-day moves, about 1.0% against about 0.6% on strongly positive days.
Loomi.Ai provides educational market research, not financial advice. Backtests and study results are hypothetical and do not guarantee future results.
Sources
- >Gamma Exposure (GEX) for SPY, Barchart
- >Best Gamma Exposure (GEX) Tools in 2026: Free and Paid, OptionScout
- >GEX Regime: Dealer Gamma, Walls and the Credit-Spread Ladder, Loomi.Ai
- >What You Get with Loomi.Ai, Loomi.Ai