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Dealer Positioning,
Decoded.

Gamma Exposure & Dealer Positioning Platform

Real-time Gamma Exposure (GEX) analytics for SPY options. See where market makers are forced to hedge — and trade with the structural edge that institutions see.

Join traders waiting for launch
gexboard.com — SPY GAMMA RADAR
What Is GEXBoard

The market has
a hidden force field.

When market makers sell options, they inherit gamma exposure. To stay delta-neutral, they must continuously buy and sell the underlying — creating invisible zones of structural support and resistance that most traders never see.

Positive gamma territory: dealers buy dips and sell rallies, dampening volatility and pulling price toward large gamma concentrations.

Negative gamma territory: dealers buy when price rises and sell when it falls — amplifying every move, accelerating breakouts, and increasing realized volatility.

GEXBoard decodes this positioning in real time. Know the Gamma Flip level, the Call and Put Walls, and whether dealers are working for you or against you — before you place a trade.

← Put GEX Strike Call GEX →
$582
$580 ▲CW
$577
$575
$568 ⊘ ZG
$567
$565
$562
$560 ▼PW
SPY · 4 EXP · OI-based LONG γ
Capabilities

Everything you need to read dealer positioning

γ
Live GEX by Strike
Gamma Exposure calculated from real open interest data, updated every 60 seconds across all strikes in the options chain.
Zero Gamma Level
The exact price where dealer hedging flips from stabilizing to amplifying volatility. The most critical structural level in the GEX framework.
Call & Put Walls
Strikes with maximum gamma concentration — the strongest structural support and resistance levels derived from actual dealer positioning.
Dealer Mode Detection
Instantly know whether dealers are in positive or negative gamma territory — and what that means for volatility regime and price behavior.
DTE Filtering
Isolate GEX by expiration cycle: 0DTE, 1DTE, weekly, or the combined 4-expiration view for a full structural picture.
Lookback Dots
Track how GEX at each strike shifted 1m, 5m, 15m, and 30m ago — overlaid directly on the live histogram for instant context.
How It Works

From raw options chain to actionable levels

01
Ingest Chain
Pull the full SPY options chain every 60s — up to 5,000 contracts across the 4 nearest expirations, filtered ±30% around spot.
02
Compute GEX
γ × OI × 100 × S² × 0.01 Per strike. Puts inverted. Black-Scholes fallback when greeks are unavailable from the API.
03
Derive Levels
Find the zero-crossing (Gamma Flip via linear interpolation), max positive strike (Call Wall), min negative strike (Put Wall), net GEX, and dealer mode.
04
Visualize
Interactive GEX histogram with live reference lines, intraday price path overlay, and lookback dots at 1, 5, 15, and 30 minutes.
Early Access

Be first to see what dealers see.

We're building GEXBoard for serious options traders. Early access users get priority onboarding and locked-in founder pricing.