The most used sources (May 2023):
https://www.investing.com/ EOD
https://www.dukascopy.com/swiss/english/marketwatch/historical/ Intraday
https://eatradingacademy.com/software/forex-historical-data/ Forex and other instruments Intraday
https://www.finam.ru/profile/forex/eur-usd/export/?market=5 Intraday (Russian language)
All sourcers
http://www.global-view.com/forex-trading-tools/forex-history/ Forex free data
http://www.pitrading.com/free_market_data.htm over17 Gigabytes of one-minute intraday historical data for over 300 of the most popular and actively traded symbols for stocks, indices, futures, and forex on one DVD-ROM. Click here for further details and pricing information.
http://www.forexdata.bizb Some free from 1987, pay for other stuff
Internet sources for price history data provided by W.Scott
Dollar Index monthly and daily from Fed
http://www.federalreserve.gov/releases/h10/summary/indexb_m.txt (monthly)
http://www.federalreserve.gov/releases/h10/summary/indexb_b.txt (daily)Historical wheat prices and war index
Article INFLUENCEOF SOLAR ACTIVITY ON STATE OF WHEAT MARKET IN MEDIEVAL ENGLAND
Historical data from Harvey Hahn
COMMODITY DATA:
http://techsignal.com/data/long_term_data.htm Long Term Historical prices series can be found at the Foundation for the Study of Cycles data page, they cost $35 per series.
Gold Stock Analyst http://www.goldstockanalyst.com/
http://www.sentimentrader.com/
Historical and real-time market database
http://www.tickstory.com/Fintech Finance (40 yeras of FX data in the cloud)
http://www.fintech.finance/news/tradermade-puts-40-years-of-fx-data-in-the-cloud/
Explanation regarding volatilitry indexes
http://www.cboe.com/micro/volatility/introduction.aspxhttps://www.cftc.gov/MarketReports/CommitmentsofTraders/HistoricalCompressed/index.htm Commodity Futures Trading Commission
Research Bank of England https://www.bankofengland.co.uk/statistics/research-datasets