There are some who speculate mainly on the basis of commodities charts
and technical analysis. They swear by various mathematical models and
theories. Good luck to them. Frankly, in my experience, I have known few
people who have gotten rich off technical analysis. (I do know people
who have made a lot of money selling technical analysis or books about
it.)
Related trading instruments: Nymex Oil futures, United States
Natural Gas Fund (UNG), United States Oil Fund LP ETF (USO), PowerShares
DB Agriculture Fund (DBA), Sugar Futures, SPDR Gold Trust ETF (GLD)
Jim Rogers is a bestselling author, financial commentator and successful international investor. Rogers was a co-founder of the Quantum Fund (considered to be the first truly international fund of its kind) and is the creator of the Rogers International Commodities Index (RICI).