You'll find GexHorizon hanging around a specific pocket of finance Twitter — where terms like "gamma flip" come up over coffee as if that's just Tuesday GexHorizon. It's a dashboard that tracks options Gamma Exposure, or GEX, for SPX, SPY, QQQ, and several well-known stocks.
What GEX Actually Measures
Here's the plain version. Whenever an option gets bought or sold, a market maker ends up on the opposite side of the trade. To stay neutral, that market maker hedges — adjusting their stock position to cancel out the risk. GEX is basically a way to size up how much of that hedging pressure shows up for every 1% swing in price.
It sounds dry, but the number carries real weight. A positive gamma reading usually means calmer price action. Dealers buy dips and sell rallies, which acts like a 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. Think of it as the difference between driving on solid pavement and hitting black ice.
Call Walls, Put Walls, and the Flip Point
GexHorizon translates all that math into three numbers most traders actually care about: the Call Wall, the Put Wall, and the Zero Gamma Flip. Dealer selling pressure tends to cap the upside right around the Call Wall. The Put Wall is roughly where dealer buying tends to hold the line underneath. 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. 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. Instead of getting buried in a forgotten tab, a flip crossing or wall test from GexHorizon lands right inside Discord or Telegram, where traders are already chatting. Not a flashy feature, but one that quietly earns its keep.
Pricing, In Plain Terms
The free tier gives a daily snapshot of levels across 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. 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.