In particular, traders will look for the market (stock, commodity, ETF, etc.) to reverse from the lows.

FORBES: A Chart Formation the Pros Love

Chart Analysis : In either a bull or bear market, whether you are talking about a stock, ETF, or commodity, it is common to see a series of flag formations.

FORBES: Profit from Flag Formations

The yellow metal had been trading in tandem with the broader commodity complex this year, as a comparison between the SPDR Gold Shares ETF (GLD) and the PowerShares DB Commodity Index shows.

FORBES: Can Gold Bulls Keep It Going After Japan's Big QE And A Weak Jobs Report?

The Powershares DB Commodity Index Tracking Fund ( DBC) is a widely followed and liquid ETF that tracks the changes in the Deutsche Bank Liquid Commodity Index.

FORBES: One High-Yielding Commodity Play

Another commodity buy was the Oil Service HOLDRs, an ETF made up of 18 large-cap oilfield services companies.

FORBES: Another Dose Of Elan With An ETF Chaser

So while the iShares ETF is heavily weighted towards the big commodity names like Petrobras (PBR) and Vale (VALE), because that is how the Bovespa index actually looks, the Dreyfus fund can mix it up and invests in companies that are not listed on the Bovespa index.

FORBES: How the Dreyfus Brazil Mutual Fund Beats the Brazil ETFs

All this for a cost that is certain to be 5 to 10 times the price of stocks and bonds for an indexed ETF, and much worse if one pays the huge price of some of the commodity partnerships being sold by the product manufacturers that have a bit of a conflict of interest on this topic.

FORBES: Gold's Twelve Month March To $3,800

The ETF will be losing value every month because of contango, not because of the performance of the underlying commodity.

FORBES: Are Your Commodity ETFs On The Right Track?

In the midst of the longest commodity boom since 1997 (see below), the hottest commodities right now are, alas, without a corresponding ETF.

FORBES: China Raises Stakes In Rare Earth Showdown