Gamma × volume is a directional activity proxy, not true gamma exposure. The API response currently lacks open interest, dealer positioning and underlying price. Values cover only contracts returned by your Worker (pagination may be incomplete). Premium estimates use daily VWAP or last trade where available; they are not actual order-flow totals.
The green and pink lines show cumulative call and put volume observed in dailyBar snapshots; the gold line shows the latest available underlying IEX bar close using the separate USD axis on the left. The lower histogram shows observed net volume changes between samples, not buy/sell aggression, net premiums, or dealer positioning. NPP and NCP are displayed as N/A because this data source cannot calculate actual net put/call premium. PRICE is the latest available IEX bar close when the sample was taken, not a synchronized trade price. The first sample shows cumulative daily volume (not historical intraday tide). Subsequent samples track changes. Partial chains, feed delays, missing contracts, and session resets can distort changes; only matched contracts with nondecreasing volumes are compared. History is saved in this browser for the current New York trading date. Collection requires this page to remain open; background tabs may be throttled. Earlier observations cannot be reconstructed from snapshots. For uninterrupted collection from market open, a scheduled server-side collector and database are required.
| Contract | Type | Expiry | Strike | Volume | OI | IV | Delta | Gamma |
|---|---|---|---|---|---|---|---|---|
| Awaiting data | ||||||||
Alpaca indicative data is not a live institutional trade tape. Premium, order-side aggressor, call walls and put walls cannot be reliably inferred from these snapshots alone. Gamma displayed is contract Greek, not dealer gamma exposure. Data availability and freshness depend on your Alpaca entitlements.
Important: This is NOT actual dealer Gamma Exposure (GEX). Alpaca's current option snapshots do not include reliable open interest or dealer positioning. The default metric uses |option gamma| × daily contract volume; it does not show signed dealer exposure. Premium estimates use snapshot VWAP or last trade and are not a transaction-level flow tape. Only contracts returned by the Worker are shown, which may be incomplete. Auto Live means the dashboard attempts to poll snapshots every 5 seconds, not streaming tick-by-tick market data. Frequent requests may be rate-limited by Alpaca or Cloudflare; snapshots may remain unchanged between polls.