GexHorizon sits in a pretty niche corner of finance Twitter — the corner where people say things like "gamma flip" over morning coffee like it's totally normal breakfast talk GexHorizon — NDX GEX Data. 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
In plain terms, here's the idea. 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. When gamma runs positive, markets tend to settle down. Buying the dips and selling the rallies — that's the dealer playbook here, and it smooths things out. Once gamma goes negative, the script flips — the same dealers now buy as prices climb and sell as prices drop, and that can turn a ripple into a wave. It's the difference between cruising on dry pavement and suddenly 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 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.
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. It's not a prediction. It's a map of pressure points.
The Alerts Feature Deserves a Mention
Nobody wants to stare at a chart all day, waiting for a level to get 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. It's a small addition, but it changes habits in a real way.
Pricing, In Plain Terms
The free tier gives a daily snapshot of levels across the major indexes — plenty for a swing trader who only checks in once or twice daily. 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. 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
The heaviest users tend to be options day traders and 0DTE traders. Someone holding for the long haul might glance at it once a week, if that often. Worth repeating honestly: these numbers are estimates pulled from public exchange data, not promises. No dashboard has ever told the market what to do. Prices go where they please, and sometimes the walls give way regardless.