Efficiency Ratio Chop Detector
Net move ÷ total travel — trend or chop?
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Net move (straight line)
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Total travel (Σ|Δ|)
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Efficiency = |net move| ÷ total travel. 1.0 = perfectly straight, near 0 = thrashing that goes nowhere. Pine v6: Yes — needs only close. The single best chop filter.