Dukascopy+historical+data 2021

Pros: Clean, indexed, complete. Cons: Expensive (typically thousands of USD), designed for hedge funds, not retail.

Most retail brokers provide data in M1 (one-minute) intervals, which hides the volatility occurring within that minute. Dukascopy provides true tick data, capturing every single price change and the associated liquidity (volume). dukascopy+historical+data

Includes volume information to see where the "big money" is moving. Understanding the Data Structure Pros: Clean, indexed, complete