GexHorizon lives inside a very specific corner of finance Twitter — where terms like "gamma flip" come up over coffee as if that's just Tuesday gexhorizon.com. Think of it as a dashboard for watching options Gamma Exposure, or GEX, across SPX, SPY, QQQ, and a few major names.
What GEX Actually Measures
Let's keep this simple. A market maker takes the other side every time an option changes hands. To keep their book neutral, the market maker hedges — picking up or shedding shares of the underlying stock to balance out the exposure. GEX estimates how much buying or selling pressure that hedging creates for every 1% move in price.
Don't let the dry name fool you — this number matters. A positive gamma reading usually means calmer price action. Dealers buy dips and sell rallies, which acts like a shock absorber. Negative gamma turns that whole dynamic on its head — 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 boils that math down into three numbers traders actually pay attention to: the Call Wall, the Put Wall, and the Zero Gamma Flip level. Dealer selling pressure tends to cap the upside right around the Call Wall. Buying pressure tends to build a floor near the Put Wall. At the flip point, the whole mood of the market — calm or chaotic — tends to change sides.
Watching spot price bounce between a call wall and a put wall on the dashboard feels a little like watching a pinball stuck between two bumpers. No crystal ball here — just a map of where pressure tends to build.
The Alerts Feature Deserves a Mention
Staring at a chart all day, waiting for a level to hit, gets old fast. 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 — which covers a swing trader glancing at the market a couple of times a day. Step up to the paid Pro tier and you get streaming, sub-second updates, built for intraday traders or anyone dabbling in 0DTE contracts where levels move by the hour. At the top end, there's a custom enterprise tier for funds and quant teams who'd rather pull raw data feeds than look at a dashboard.
Who This Actually Fits
Options day traders and 0DTE traders get the most mileage here. Someone holding for the long haul might glance at it once a week, if that often. And one honest caveat worth repeating: these are estimates built from public exchange data, not guarantees. No dashboard has ever told the market what to do. They just do whatever they want, and the walls sometimes break anyway.