Goodman Wave Theory by Michael Duane Archer
Logical and easy to apply, this wave theory can complement
your own approach to technical trading.
Charles B. Goodman devised two trading theories, the Goodman wave (GWT) and market environments (ME), and used them effectively in trading equities and commodity futures. I have further developed his work, codifying much of it. Even though I have written complex computer trading programs, GWT and ME are still my “go-to” trading methods. I have used them successfully in equities as a registered investment advisor, in futures as a commodities trading advisor (CTA), and in forex as a private trader.
Here, I will discuss the three principles of the GWT: propagation, intersection, and 3-C. These will also show how Goodman differs from other wave and swing theories. Finally, I provide a useful trade setup, the propagation trade setup (PTS), derived from Gwt principles.
THE 50% RETRACEMENT AND MEASURED MOVE
The Goodman wave theory begins with the 50% return and measured move rules and constructs a complete trading approach from the ideal 1-2-3 wave.
The 50% rule, an old but very sound one, states that prices will find support or resistance at the 50% retracement of a price swing (Figure 1). The logic is easy enough to understand. At the 50% point all the buyers and sellers in the swing are basically even. Half of the buyers and half of the sellers have profits; half of the buyers and half of the sellers have losses. Goodman taught me the importance of being able to detect the underlying logic in any chart formation or indicator tool. The relative strength index (Rsi) is, after all, a flavor of the slope-intercept equation from high school algebra:
y = mx + b
In GWT, a swing is a price trend without more than a 25% retracement. In Figure 2 the dotted lines in A and B are swings. When these buyers and sellers unwind, it will create a measured move at which price point, assuming all else is constant, either all buyers have profits and all sellers have losses (up swing) or all sellers have profits and all buyers have losses (down swing).
This 1-2-3 measured move is the ideal building block and a matrix composed of three swings: two primary (first primary swing [Fps] and second primary swing [Sps]) and one secondary (secondary swing [SS]). The diagram in Figure 3 displays an up matrix and a down matrix. A matrix need not conform to the ideal measurements as long as the SS is a swing.