"GEX calculator" and "GEX dashboard" mean different things depending on what you need. Some people want a per-ticker lookup - type TSLA, see the levels. Others want a multi-ticker scan - which names are in positive vs negative gamma regime right now? Both tools are free on FlashAlpha, no signup, no credit card, no time-limited trial.
GEX Calculator — Single Ticker Lookup
The GEX calculator is the per-ticker tool. Type any US-listed symbol, and it returns:
- Net GEX - aggregate dealer gamma position, signed.
- Gamma flip price - where cumulative GEX crosses zero.
- Call wall - strike with the largest positive dealer gamma (intraday resistance).
- Put wall - largest negative dealer gamma (intraday support).
- Per-strike GEX chart - every active strike, dealer gamma signed and scaled.
- Regime label - positive / negative gamma regime based on spot vs flip.
The computation runs on live option chain data and refreshes intraday, not end-of-day. If you've used other "GEX calculators" that return stale data or require a spreadsheet upload, this is the opposite - type a symbol, get the current state of dealer positioning.
Try it: Open the GEX calculator and type SPY, TSLA, NVDA, or any other US-listed ticker to see live dealer gamma positioning.
GEX Dashboard — Multi-Ticker View
When you need the bigger picture across several names at once, the GEX dashboard shows the top-traded US tickers side by side:
- Net GEX per ticker
- Gamma flip, call wall, put wall
- Current price vs flip (regime indicator)
- At-a-glance view of which names are in suppressed-vol vs amplified-vol regime
Useful before the open to check "what's the market setup today" - if SPY, QQQ, and the megacaps are all positive-gamma and pinned near their largest GEX strikes, expect a range day. If half the names flipped short gamma overnight, expect volatility expansion.
Which One Do You Want?
| If you need… | Use |
|---|
| One ticker's full GEX breakdown + per-strike chart | GEX Calculator |
| Multi-ticker overview before the open | GEX Dashboard |
| Per-strike data inside your own code / notebook | GEX API (5 req/day free) |
| Ticker-specific page with all metrics (GEX + IV rank + max pain + skew) | /stock/{ticker} pages |
What the Calculator Does Under the Hood
Calling it a "calculator" is slightly misleading - you don't feed it option prices and get GEX out. The calculator reads the live option chain, computes gamma per contract using Black-Scholes with real-time IV, multiplies by open interest, signs the result using the dealer convention (dealers short calls customers bought, long calls customers wrote - same for puts), and aggregates to a per-strike profile.
In other words: the "input" is the ticker. Everything else is computed automatically from live options data. No spreadsheet, no manual option chain downloads, no guessing at the dealer side of each trade.
For the mechanics of how dealer gamma drives price, what gamma exposure actually measures covers the theory. For reading the chart, how to read a GEX chart walks through the levels.
GEX Calculator vs Other Tools
Honest comparison of where this fits:
- vs SpotGamma: SpotGamma has a longer track record and daily written analysis. FlashAlpha's calculator is free to view for every ticker without a trial countdown and exposes the data via API. If you want expert commentary on top of the levels, SpotGamma. If you want programmatic access and a no-login entry point, FlashAlpha.
- vs Unusual Whales: Unusual Whales is strongest on options flow and dark pool data. The gamma dashboards exist but aren't the core product. FlashAlpha is the other direction - computed exposure analytics are the core product, flow isn't.
- vs free "GEX calculator" spreadsheets: Spreadsheets require you to download option chains manually, compute gamma per contract, handle sign conventions, and refresh by hand. This tool is the automated version.
For a deeper comparison, SpotGamma vs Unusual Whales vs FlashAlpha goes into each tool's strengths.
Programmatic Access
If the calculator is the "UI" version, the API is the "wire it into your own dashboard" version. The free tier gives 5 requests per day against the GEX endpoint, enough for a small daily scan:
curl -H "X-Api-Key: YOUR_KEY" \
"https://lab.flashalpha.com/v1/exposure/gex/SPY?expiration=2026-05-16"
The response is the same data the calculator renders - net GEX, gamma flip, regime label, and the full per-strike array. Call wall and put wall come from the sibling /v1/exposure/levels/{symbol} endpoint. Grab a free API key and see the GEX endpoint reference for schema details. (Free tier: single-expiry queries only. Full-chain aggregation is a Growth feature.)
FAQ
Is the GEX calculator really free? Yes. Every US-listed ticker, unlimited views, no signup required.
Does it cover small-caps and ETFs? Yes - any US-listed name with an active option chain. GLD, SLV, ARM, MU, SOFI, and thousands of others.
How often does it update? Intraday, as option flow lands. Not an end-of-day snapshot.
Can I embed it? A limited embed view exists at /stock/{ticker}/embed-key-levels for the derived levels.
What's the difference between the calculator and the dashboard? Calculator = one ticker at a time, full breakdown. Dashboard = many tickers at a glance, top-line metrics only.
