Hermēs DocumentationGEX Data Center
The GEX Data Center gives precise per-strike GEX values — control node, HVL, Call/Put transition, MaxPain and anomaly exposure — with ladder comparison across 0DTE/next-day/all-expiry. It is the numeric bedrock for futures and options traders to verify key levels. Requires Pro.
The GEX Data Center gives you precise per-strike GEX values — not a heatmap, but a readable table and ladder comparison. It is the numeric bedrock for futures and options traders to verify exactly how thick and dense a key level is. Requires Pro.
Open it in the Options Desk via ＋ New Window → Data & Analytics → GEX Data Center. To see emotive real-time call/put flow, pair it with the Live Flow (Flow Pulse) window.
Who it is for
Futures + options traders. The main chart says "there's a wall here"; the GEX Data Center tells you "how thick that wall is, whether there's a gap nearby, whether the 0DTE and all-expiry distributions agree" — confirming structural confidence with numbers.
The two tabs
GEX Table
The top info card gives spot, control node (zero gamma), distance percentage, a net-GEX bar, and badges HVL, C-Trans (Call transition), P-Trans (Put transition), MaxPain. Below, each strike lists STRIKE, Δ, GEX values by expiry; inline semantics tag Call/Put walls, hot strikes and anomaly exposure, with velocity dots flagging strong new positioning / active (volume and open-interest velocity).
Ladder Comparison (⊞)
Puts the 0DTE / next-day / all-expiry GEX distributions side by side; switch single or multiple expiries, with the field being OI-weighted GEX ($) and support for adding columns. A GEX interpretation footnote sits at the bottom. Use it to judge whether today's structure is "temporarily piled up by 0DTE" or "recognized across all expiries".
How to read it
Above the control node → long Gamma suppresses volatility (mean reversion); below → short Gamma amplifies it (trend). A strike with very thick GEX where 0DTE and all-expiry agree → trustworthy wall, trade it as resistance/support; only in 0DTE → may crumble into the close. Anomaly exposure + strong new positioning → new money is betting at this strike, watch closely.
Anomaly exposure uses robust statistics (median + 3×MAD) to flag strikes that deviate significantly, resistant to outliers.
Typical workflow
- Read regime and rough key levels from the main chart first.
- Use the GEX Table to verify the exact strike and thickness of the control node, Call/Put walls and MaxPain.
- Switch to Ladder Comparison to confirm whether key levels agree across 0DTE and all-expiry.
- Watch anomaly exposure + new-positioning dots for newly added chips that day.
- Take key levels into the Strategy Workshop or the futures Playbook.
Next steps
Frequently asked questions
What subscription does the GEX Data Center need?
The GEX Data Center is a Pro window — log in with a Pro or higher subscription; specific tickers are also gated per ticker.
How is the GEX Data Center different from the main chart?
The main chart draws GEX as a visual heatmap and levels; the GEX Data Center gives precise per-strike numbers and ladder comparison — ideal when you need concrete values and to verify exactly how thick a strike is.
What is the control node?
The control node is the zero-gamma strike — the boundary where dealer net gamma flips from positive to negative. Above it, volatility is usually suppressed; below it, volatility is amplified.
Portfolio
The Portfolio window aggregates every structure built in the Strategy Workshop into one portfolio risk sheet — total Delta/Gamma/Theta/Vega, max P/L and theoretical probability of profit — so you can see net exposure across stacked structures before you trade. Requires Pro.
Market State & Scan
Market State uses 8 regime cards and a cross-asset scan table to show IV, IV Rank, net GEX, CVR and automatic regime classification for ES/NQ/SPY/QQQ/VIX/GLD/BTC/ETH on one screen — the overview window for setting the open's tone and sweeping for opportunities. Requires Pro.