Does Currency Trading Correlate with Commodity Prices?by Kathy Lien
Predicting the next move in the markets is the key to making money in trading - but putting this simple concept into action is much harder than it sounds. Professional forex traders have long known that trading currencies requires looking beyond the world of FX. The fact is that currencies are moved by many factors - supply and demand, politics, interest rates, economic growth, and so on. More specifically, since economic growth and exports are directly related to a country's domestic industry, it is natural for some currencies to be heavily correlated with commodity prices.
Source: http://www.investopedia.com/articles/forex/06/CommodityCurrencies.asp; http://www.bktraderfx.com/site/members-benefits; http://www.gftforex.com/