Chart Patterns
Gartley Harmonic Pattern
The Gartley "222" pattern is a five-point XABCD swing where each leg has to land inside a specific Fibonacci ratio band, all four checks have to pass together, not just one.
Check every leg, then call the pattern
Each trial generates a fresh XABCD swing with all five pivots already placed. Some are genuine Gartleys, some are close decoys with one leg pushed out of band. Step through the checklist, each ratio computed live from the real pivot prices, then call it Valid or Invalid before the tool reveals the real verdict and plays price forward from D.
AB / XA: pending
BC / AB: pending
CD / BC: pending
D / XA (potential reversal zone): pending
How it works
- AB retraces 61.8% of XA. The tool computes AB/XA directly from the pivot prices and checks it against a 0.618 target with a small tolerance band.
- BC retraces 38.2% to 88.6% of AB. This is a wider band by design, BC/AB just has to land anywhere inside that range.
- CD extends 113% to 161.8% of BC. CD/BC gets checked against that same style of range.
- D is the potential reversal zone, checked as roughly 78.6% of the entire XA move. This is where a genuine Gartley expects price to turn, and it is the last of the four checks, computed as (A minus D) divided by (A minus X).
- All four checks have to confirm together. A pattern with three ratios sitting perfectly on target and one leg outside its band is not a Gartley, it is a decoy, and this tool builds both kinds on purpose.
Where this breaks
A textbook ratio structure is not a promise of a reversal
Harmonic ratios are pure pattern recognition on price alone. A Gartley that passes all four checks can still fail to reverse at D, especially against a strong prevailing trend that simply runs through the zone without pausing. This tool's stat table typically shows a real Gartley reversing at D more often than a decoy pattern does, not reversing every time. It is also worth being honest that real-world harmonic trading usually leans on confluence, a prior support or resistance level, a round number, a moving average sitting near D, to add conviction. This tool checks pure ratio structure only, it does not model any of that confluence, so treat a Valid call here as a geometry check, not a complete trade signal.