2004issue C081-6

Cobweb turning points from price structure

Linear cobweb reasoning can project the next turning point from prior price extremes when historical levels still dominate. Three constant-slope extremes are the working hypothesis, and a Point and figure chart should supply genuine turns from the widest zigzag.

Technical work splits into noise-filtering of price as a corrupted signal and barrier ideas such as support, resistance, and turning-point patterns.
A linear cobweb can project the next turning point from prior extremes without explicit supply, demand, or quantity schedules.
The construction is most relevant when historical price levels dominate, and is generally the wrong paradigm when recent price change or news is the main driver.
Use it only when supply and demand slopes are treated as constant, three prior turning points support that hypothesis, and the input is the widest zigzag of genuine extremes.

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Point and figure chart37 readings Current trackPattern recognition48 readings

Price as signal and as barrier

Technical work can be split into noise-filtering of price as a corrupted signal versus barrier concepts such as support, resistance, and turning-point patterns. Linear cobweb reasoning can project the next turning point from prior price extremes without requiring explicit supply, demand, or quantity schedules.

When cobweb oscillation applies

Cobweb-style oscillation is most relevant when historical price levels dominate behavior. It is generally not the right paradigm when recent price change or news is the main driver. Relative slopes of supply and demand determine whether successive turning points dampen, stay regular, or expand, which maps onto a sideways market remaining inside prior peaks and troughs.

Three tenets and a three-point hypothesis

Three linear cobweb tenets are anchoring on recent extremes, a rising supply schedule as quantity increases, and a falling demand schedule as quantity bought increases. The linear construction should be used only when supply and demand slopes are treated as constant and three prior turning points support that hypothesis. Under the linear cobweb premise, three relevant prior price turning points are sufficient to infer the next extreme, which is the same implicit premise used in Point and figure chart projection from price alone.

Choosing the zigzag

If Point and figure charts are used to locate those turning points, genuine price extremes should be used rather than extremes created by the chosen box size, and nested cobwebs should not be fed into the same calculation. The widest available zigzag of turning points is the preferred input for projecting the next extreme under the cobweb construction.

Educational research material, not investment advice. Historical source context does not establish present-day performance.

17 of 25 in the Pattern recognition track

20051-4 pp.Next on Pattern recognitionHybrid decision trees and pattern recognition for trend rulesUnaided decision quality can rise as information is first added and then fall once information saturation is reached.

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