Commodities Correction - The 20-50 Rule

Commodities are in correction mode. I think this correction has further to go in time and price. However, I don't think it will last long. The question in my mind is whether or not to buy general commodities at the end of the correction. Only Mr. Market knows for sure...However, I give you the "20-50 rule" on a weekly chart of the CCI Commodities Index for your consideration. This rule has worked