I built a tool that maps dealer gamma exposure by strike. NVDA is up 3.44% today and sitting 0.01% from its call wall.
Been building a free gex map — plug in any optionable ticker, see net dealer gamma by strike, the zero-gamma flip, call/put walls, max pain, expected move. No login on the map itself.
https://preview.redd.it/c4o4jco6m6nh1.jpg?width=1320&format=pjpg&auto=webp&s=596866ded4b298a1425ec9a7803ae09211c45811
Ran NVDA through it: up 3.44% today, reading positive gamma, sitting in zone between its put wall and call wall — but only 0.01% of room left before it hits the call wall at 225.
# The full read on it:
https://preview.redd.it/p9ojnkq8m6nh1.jpg?width=1320&format=pjpg&auto=webp&s=73cf02eb7ff9e17eaca4c7b51c95a9b8b5b1a8a9
Zero-gamma flip at 220.76, call wall at 225, put wall at 215, max pain at 220, expected move ±$1.29 , ATM IV 16%.
# Here's what that actually looks like across the chain:
https://preview.redd.it/4rp02mpem6nh1.jpg?width=1320&format=pjpg&auto=webp&s=ed9f4a0edf3c2f43adcab4fafb922e056547b9b8
That green bar right at 225 is the whole story — a massive positive-gamma concentration sitting almost exactly where spot is right now ($224.97). Net GEX is +$2,146M per 1% move, and +$2,069M of that is stacked above spot vs only +$77M below it. Almost all the gravity in this name right now is overhead.
https://preview.redd.it/i4hfdfkgm6nh1.jpg?width=1320&format=pjpg&auto=webp&s=06239e8557e8afd644a763af90a447300efc1200
positive gamma this concentrated means dealers are net long gamma, selling strength and buying weakness, which compresses realized volatility and pulls price toward the big strikes instead of letting it run. The expected tape is grindy and mean-reverting inside the 215–225 band
Built this because I got tired of paying for someone else's gamma dashboard to answer a question that's really just open interest + greeks + arithmetic.
Feedback on what's useful or missing is genuinely welcome, still actively building it out.
Not a recommendation on NVDA. Positive gamma describes a regime only used as example