Data, Market Data & API A central resource for market data sources, API access, and infrastructure details. Data Catalog Futures quotes, Option Volatility, Order Book (DOM), and Open Interest history. API & SDK Documentation, endpoints, SDK for Python/Excel, and Sandbox access for developers. Data Providers Overview of CQG and other market data streams (Real-time / Historical). Infrastructure History storage details, data quality checks, and SLA/Latency information. Trading Calendar Key dates, expirations, and economic releases.