Its correlation to market prices has been referred to in the works of George Bayer, Gustave Lambert- Brahy, Donald Bradley, David Williams and W.D. Gann, as well as others, during the first half of this century. However, it wasn t until 1977 that any formal quantitative studies on the subject were initiated, and soon thereafter the interest in the field began to grow. 5 year subscription to Working Money. Free book selection. Limited time offer.
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