5-0

What is the 5-0 pattern?

The 5-0® is a five-point harmonic structure, distinctive because it begins with a failed trend rather than a clean retracement. The pattern is labeled 0-X-A-B-C-D: an initial swing into X, a reaction to A, then an AB leg that breaks beyond X at a 1.13 to 1.618 extension of XA, an even longer BC leg at 1.618 to 2.24 of AB, and a final CD leg that retraces precisely 50 percent of BC. That 0.50 retracement is the pattern's signature and the source of its name.

Inside the structure sits a reciprocal AB=CD®: the CD leg approximately equals the AB leg in price distance, but as a retracement of the larger BC move rather than a continuation. The usual reading is behavioral: the 0-X-A sequence looks like a failed final wave of the old trend, B is a failed breakout attempt, and the powerful BC leg establishes the new direction. The 50 percent pullback at D then offers a place to join the new trend, which makes the 5-0 more of a continuation entry than the deep reversal completions of the classic harmonic patterns.

As with the other harmonic structures, D is not a trigger by itself. The 0.50 BC retracement and the reciprocal AB=CD define a potential reversal zone, and the trade is the reaction inside that zone, managed with the usual execution discipline.

How to identify a 5-0 pattern on a chart

The measurements are unusual for a harmonic pattern, so a Fibonacci tool and strict sequencing matter more than shape recognition.

1. 1Find an impulsive move into X followed by a reaction to A; the 0-X-A sequence often reads as the last gasp of a prior trend.
2. 2Measure AB: it must extend beyond X, landing between 1.13 and 1.618 of the XA swing; a move short of X voids the pattern.
3. 3Measure BC: it should run 1.618 to 2.24 of AB in the opposite direction, a strong leg that typically breaks the prior trend structure.
4. 4Project D at the 0.50 retracement of BC and cross-check that CD roughly equals AB in price distance, the reciprocal AB=CD.
5. 5Wait for price to trade into the zone and show a reaction in the direction of the BC leg; a decisive break through the 0.618 retracement of BC is the common invalidation reference.

How traders use it

• As a trend-joining entry: because BC often marks the first strong leg of a new trend, the 50 percent pullback at D is used to enter with that new direction rather than against it.
• With structure confirmation: many practitioners require the BC leg to have broken prior swing structure before trusting the D zone, on the logic that the pattern is only useful if a trend change is actually underway.
• For defined risk: stops are commonly placed beyond the 0.618 retracement of BC, with targets back toward the C extreme; the shallow retracement keeps the risk-to-target geometry attractive when the zone holds.
• With honest limits: the 5-0 appears less frequently than Gartley-type patterns and its early legs are easy to mislabel in real time, so most scanners flag it only after BC completes.

5-0 vs related harmonic structures