Retracements measure pullbacks inside a swing. Extensions project beyond it: if price breaks past the end of a swing, how far might the move carry?
The common extension ratios are 1.272 and 1.618. Where a retracement multiplies the swing by a fraction smaller than one, an extension multiplies it by more than one and projects the result past the swing’s end. The mechanics are identical — same swing, same arithmetic, different direction.
What extensions are for
Two things. First, targets: if you entered at a support zone, the extensions above are measured places to take profit, chosen before the trade instead of improvised during it. Second, context: when price is in territory with no prior structure to lean on (new highs, for example), extensions are one of the few measured references left.
How FibSetups uses them
Extensions participate in zones exactly like retracements do. If the 1.272 extension of one swing lands where the .618 retracement of a larger swing sits, those two independent calculations reinforce each other and the cluster’s score reflects it. On a roadmap chart, the extension levels of the governing swing also mark the roadmap targets — the objective side of the map. An alert can fire when a roadmap objective is tagged, so targets watch themselves.
The honesty rule applies here too: an extension is a measured reference, not a promise. Price owes it nothing. It is a place to plan around — where you evaluate, take profit, or reassess — not a place the market must visit.