Corrective Wave

The Four Corrective Types

Elliott's correctives are the counter-trend counterpart to the impulse, always resolving in three (or three-of-three) waves rather than five, and Closelook's toolkit recognizes four shapes. A zigzag is the sharpest: wave B retraces roughly 50-79% of wave A before wave C extends beyond A's start, giving the whole structure a steep, directional look. A flat is closer to sideways — wave B retraces 90% or more of A, sometimes overshooting it (expanded flat) or falling short (running flat) before wave C completes near or beyond A's extreme. A triangle contracts rather than corrects outright: five overlapping waves labeled A through E converge toward an apex, usually signaling the larger trend has one more move left. A combination chains two or three simple corrections — labeled W, X, Y and optionally Z — separated by connector X waves, producing an extended sideways phase that outlasts any single zigzag or flat.

Why Corrections Are Where Counts Break

Correctives carry far less structural constraint than an impulse. An impulse has three hard, falsifiable rules; none of the four corrective shapes carry an equivalent rule that Closelook's toolkit enforces — zigzag, flat and triangle all pass validation freely because their internal ratios are guidelines, not hard rules. That absence of a hard stop is exactly why practitioners mislabel corrections more often than impulses: a flat that keeps extending can be relabeled as a triangle, and a triangle that breaks its own trendline can retroactively become a running flat. The practical fix is patience — treat a corrective label as provisional until the structure completes and the next impulse confirms it, and lean on the invalidation level of the larger wave the correction sits inside rather than the correction's own internal shape.