GexHorizon sits in a pretty niche corner of finance Twitter — where terms like "gamma flip" come up over coffee as if that's just Tuesday gexhorizon.com. 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
Let's keep this simple. Every time someone buys or sells an option, a market maker takes the other side of that trade. 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. A positive gamma reading usually means calmer price action. Dealers buy dips and sell rallies, which acts like a shock absorber. Negative gamma flips the script — dealers get forced into buying as prices rise and selling as prices fall, which can turn a small move into a much bigger one. Think of it as the difference between driving on solid pavement and hitting black ice.
Call Walls, Put Walls, and the Flip Point
GexHorizon turns all that calculation into three figures most traders genuinely watch: the Call Wall, the Put Wall, and the Zero Gamma Flip. The Call Wall marks the spot where selling pressure from dealers tends to put a lid on further gains. The Put Wall marks where buying pressure tends to hold a floor. The flip point is where the whole regime — calm or chaotic — tends to switch.
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. Nobody's calling the future with this. It's simply a map of pressure points.
The Alerts Feature Deserves a Mention
Few people have the patience to babysit a chart just to catch one level getting tagged. GexHorizon sends level alerts directly to Discord or Telegram, putting a flip crossing or wall test right where traders already spend their time, rather than lost in a browser tab. It's a small addition, but it changes habits in a real way.
Pricing, In Plain Terms
The free plan hands over a daily snapshot of levels for the major indexes — enough for a swing trader checking things once or twice a day. The Pro tier, which costs a monthly fee, opens up sub-second streaming data for intraday traders and 0DTE players, since levels there can shift within the hour. Beyond that is a custom enterprise plan aimed at funds and quant desks that prefer raw data feeds over a dashboard view.
Who This Actually Fits
Options day traders and 0DTE traders get the most mileage here. A buy-and-hold investor could skip this most days without missing much. And one honest caveat worth repeating: these are estimates built from public exchange data, not guarantees. Markets don't read dashboards. Markets do their own thing, and every so often, a wall just breaks.