You'll find GexHorizon hanging around a specific pocket of finance Twitter — the corner where people say things like "gamma flip" over morning coffee like it's totally normal breakfast talk GexHorizon. It's a dashboard built for tracking options Gamma Exposure, or GEX, across SPX, SPY, QQQ, and a handful of big-name stocks.
What GEX Actually Measures
Here's the plain version. A market maker takes the other side every time an option changes hands. That market maker then hedges to stay neutral — adjusting their stock position to cancel out the risk. GEX puts a number on how much buying or selling pressure that hedging generates for every 1% price move.
That number matters more than it sounds. Positive gamma tends to calm a market down. Dealers end up buying dips and selling rallies, acting like a built-in shock absorber. Once gamma goes negative, the script flips — dealers wind up buying into strength and selling into weakness, which can snowball a minor move into something much larger. It's the difference between cruising on dry pavement and suddenly hitting black ice.
Call Walls, Put Walls, and the Flip Point
GexHorizon boils that math down into three numbers traders actually pay attention to: the Call Wall, the Put Wall, and the Zero Gamma Flip level. The Call Wall sits where dealer selling pressure tends to cap upside. The Put Wall marks where buying pressure tends to hold a floor. At the flip point, the whole mood of the market — calm or chaotic — tends to change sides.
Seeing spot price ping-pong between a call wall and a put wall on the screen feels a bit like watching a pinball trapped between two bumpers. No crystal ball here — just a map of where pressure tends to build.
The Alerts Feature Deserves a Mention
Nobody wants to stare at a chart all day, waiting for a level to get tagged. GexHorizon pipes level alerts straight into Discord or Telegram, so a flip crossing or a wall test shows up where traders already hang out instead of buried in some forgotten browser tab. It's a small addition, but it changes habits in a real way.
Pricing, In Plain Terms
At no cost, the free tier offers a daily snapshot of levels across major indexes — which covers a swing trader glancing at the market a couple of times a day. The paid Pro tier unlocks streaming, sub-second updates for people trading intraday or dabbling in 0DTE contracts, where levels can shift by the hour. Above that sits a custom enterprise option built for funds and quant desks that want raw data feeds instead of a dashboard.
Who This Actually Fits
Day traders working options, along with 0DTE traders, get the most out of this. Someone holding for the long haul might glance at it once a week, if that often. One thing worth saying plainly — this is all estimated from public exchange data, never a guarantee. No dashboard has ever told the market what to do. They just do whatever they want, and the walls sometimes break anyway.