Hermēs DocumentationWhole-Market Institutional Data
Ultra-only — options order flow, cross-expiry Greek heatmaps (GEX/DEX/VEX/CEX), full term structure, Symbol Center, and ticker news wired into the entire US market. Any ticker, on demand.
Beyond Dark Pool, this release wires an entire layer of institutional options data into the whole US market — no longer limited to the 62-symbol catalog. These windows are all Ultra-only and carry a free-text box in the header: type any US stock/ETF ticker (DIS, JPM, BA) and press enter to load it.
Two tiers of coverage, one terminal: 62 core instruments get real-time, replayable GEX; beyond that, the entire US market is on tap as an institutional data layer. All computed in real time from official exchange options-chain data.
Who can use it
- Ultra + signed in. Non-Ultra users see an upgrade prompt.
- Location: Options Desk → "Add window", then add any institutional window below.
- Coverage: any US ticker (single names + ETFs + indices, per each data type's scope).
Five institutional windows
Options Order Flow
Real, consolidated option prints — sweeps · blocks · splits · multi-leg complex orders streaming in with premium, greeks, moneyness, and sentiment. Supports single-name and market-wide scope. See which way institutions lean before the crowd does.
Greek Heatmap (GEX/DEX/VEX/CEX)
Lays out Gamma · Delta · Vanna · Charm net exposures as a heat matrix across strike × expiry — one image pinpoints which strike and which tenor is suppressing or amplifying volatility. Server-trimmed to a band of strikes near spot × the nearest expiries, so payloads stay light.
Greek Exposure (per-strike)
Per-strike call/put/net exposure for a single name, switchable between GEX (Gamma) / DEX (Delta) / VEX (Vanna) / CEX (Charm). Fills in the Vanna / Charm dimensions beyond classic GEX, so you can read how IV moves and time decay push hedging flow.
Full Term Structure
ATM IV and 25Δ skew from 0DTE to years in a single pull — see how vol pricing steepens or flattens around events instead of staring at one expiry. Folded into the Vol Matrix window alongside a multi-day smile overlay.
Symbol Center
Compresses a name's full dealer picture onto one screen: quadrant · hedging profile · Gamma flip · cumulative strike sum. Catalog names use the same real-time chain as the main chart; any out-of-catalog US name uses a per-strike greeks snapshot — type the ticker to load.
There's also a News window that aggregates headlines + exchange events (halts / IPOs / short-sale restrictions) by single name or market-wide, with headlines auto-localized in the Chinese UI.
Typical workflow
- Type the ticker you want in any institutional window (not limited to the 62-symbol catalog).
- Read Order Flow for direction and unusual blocks.
- Use Greek Heatmap / Greek Exposure to locate the strike and tenor suppressing or amplifying volatility.
- Check Term Structure for IV steepening/flattening around events.
- Roll it all up into Symbol Center for the name's full dealer picture.
Coverage varies by data type: dark-pool (off-exchange prints) only makes sense for stocks/ETFs, while options data (order flow / heatmap / term structure / greek exposure) also works for indices. Windows degrade gracefully and prompt you when a symbol isn't applicable.
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Frequently asked questions
What subscription do these institutional windows need?
All are Ultra-only and require an Ultra subscription and sign-in. They tap institutional options data sources covering the entire US market (single names + ETFs + indices).
Can I look up stocks beyond the 62-symbol catalog?
Yes. Dark Pool, Order Flow, Greek Heatmap, Term Structure, Greek Exposure, and Symbol Center all have a free-text box in the header — type any US stock/ETF ticker (e.g. DIS, JPM, BA) and press enter to load it directly, unbounded by the 62-symbol catalog.
What are VEX and CEX versus GEX and DEX?
GEX = Gamma exposure, DEX = Delta exposure, VEX = Vanna exposure (how IV moves reshape hedging), CEX = Charm exposure (how time decay reshapes hedging). The Greek Heatmap and Greek Exposure windows lay out all four net exposures across strike × expiry so you can see which strike and which tenor suppresses or amplifies volatility.
How often does the data refresh?
Each window refreshes by data nature (order flow ~every minute, snapshot types every few minutes); identical requests reuse a cross-user shared cache within its TTL to control upstream calls and cost.
Dark Pool
Ultra-only — X-ray off-exchange dark-pool prints across all US equities: price-level clustering, intraday notional flow, and block-by-block cross prints. See where the silent money is positioned.
Market Review
An auto-generated post-close review of ES / NQ / VIX — what happened today, how levels performed, and what to watch tomorrow.