There are 3 countries of signification in the forex market whose economy is closely tied up with commodities. These are Canada, the planet’s 2nd largest exporter of oil; Australia, a major gold producer; and New Zealand, with a larger basket of commodity exports. The USD/CAD pair is maybe the commonest. With Canada being an exporter of oil and the United States being a big importer, a go down or up in the price of oil is likely to affect this pair immediately. It’d be funny to be trading USD/CAD without taking any notice of oil costs. In the same way, traders concerned with the Australian greenback have to be privy to the possible impact of changes in the value of gold. The general commodity price index is the one to look at here. Naturally, even where there is a robust business link to a specific commodity, the effect on currency prices is not necessarily direct. Other considerations also have an effect on the currency market. Little changes in commodity costs are often ignored by the market. The effect is more conspicuous when there is a huge go up or down or, indeed, a prediction of a major change in the price of the commodity. Often, the currency price won’t react right away. By identifying a trend in the price of oil, as an example, traders can frequently enter the USD/CAD market ahead of a reactive trend forming in the cost of the currency pair.