Market Data
Read the source. Keep the context.

Market-data articles focus on what a price observation actually represents. A stock quote belongs to a defined feed; a crypto order book belongs to a particular venue and product. Preserving that context is essential when an application displays spreads, depth, or freshness.

These guides explore fields, timestamps, units, snapshots, and recovery. The worked numbers are explicitly hypothetical and help illustrate calculations, not investment outcomes. Begin with the stock quote article to separate bids, asks, trades, and derived values. Then use the crypto guide to understand why a local order book needs a visible synchronization state. Both connect to the shared data-model documentation for a provenance-first application design.