Comparison · checked October 2, 2026
GEX tools compared
There is no single best gamma tool. Here is what each one is strongest at, from their own published pricing pages, and where Signa fits. Prices change; check each provider before you buy.
| Provider | Published price | Strongest at | Worth knowing |
|---|---|---|---|
| SpotGamma | $89–$299 / mo retail; institutional from $1,999 | Daily founder-written market notes, key levels, and HIRO real-time dealer-hedging flow (top tier). | No public API. Its own pages list different plan names and prices; confirm at checkout. |
| MenthorQ | $129 / mo (discounted first month); Pro $349 / mo | Levels as overlays inside third-party charting platforms, plus courses and live mentoring. | Pro adds weekly mentorship and live trading sessions. |
| Unusual Whales | $50 / $75 / $120 per mo (less billed annually); free tier delayed | Options flow and dark pool first; GEX dashboards included, 1-minute GEX on the top tier. | API sold separately. |
| FlashAlpha | Free (5 requests/day), $79, $299, $1,499 / mo | API-first: GEX, vanna and charm exposure as data, historical replay on the top tier. | Built for developers and systematic traders more than dashboards. |
| QuantWheel | $29 / $49 / $79 per mo | Lowest price for GEX with vanna and charm heatmaps; free calculators. | Options flow and API only on the $79 plan. |
| Barchart, OptionCharts | Free basic GEX charts (OptionCharts charges for walls and flip) | Quick per-expiry GEX charts at no cost. | Charts only: no flow, scoring or alerts around them. |
| Signa | $49 / mo Individual ($39 billed annually); 7-day trial, no card | GEX levels, vanna and charm on 2,300+ tickers plus options flow, dark pool, AI agents and a scored Action Card in one plan; API and MCP access. | No real-time dealer hedging-flow view yet. |
Who should pick what
- You trade SPX intraday and want a daily written read: SpotGamma's notes and HIRO are built for that.
- You want levels drawn inside a third-party charting platform: MenthorQ does that today.
- You are building a bot or a model: FlashAlpha's API, or Signa's API and MCP.
- You want the cheapest GEX heatmaps: QuantWheel, or free charts on Barchart.
- You want GEX next to options flow, dark pool and a scored call for each ticker in one place: that is what Signa is built for, at $49 a month.
Start 7-day trial
No card. The trial ends after 7 days unless you choose a paid plan. There is no automatic charge.
See Signa GEXNames are trademarks of their owners. Signa is not affiliated with these providers. Information is from public pages as of October 2, 2026 and may have changed. Educational content only, not financial advice.