Gartley + Butterfly pattern – a comparison

Harmonic Chart Analysis Basics

Harmonic trading is a unique methodology that combines geometric price patterns with the mathematical precision of Fibonacci levels. This approach is rooted in the idea that market cycles repeat, forming geometric st

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ructures that allow for high-probability predictions of reversal points. Among the multitude of formations, the Gartley and Butterfly patterns take center stage. Despite a visual similarity that resembles the Latin letters M or W, they carry fundamentally different trading signals and rely on specific retracement and extension ratios. Understanding the nuances of each model allows a trader not only to identify entry zones with precision but also to effectively filter out false market noise, preserving capital in conditions of high volatility.

Geometry and Proportions of the Gartley Pattern

The Gartley pattern, often called Gartley 222 in honor of a page from Harold Gartley’s book, is considered a classic of harmonic analysis. It is a corrective model that forms within an existing trend. The golden rule here is that point D (the pattern’s completion) never exceeds the starting point X. From the perspective of Fibonacci levels, an ideal Gartley requires the retracement at point B to be exactly 61.8% of the XA impulse. The completion of the model at point D occurs at the 78.6% retracement of XA. This structure indicates a temporary weakening of the trend and preparation for its continuation. For a trader, this is a signal that the market has found support (in a bullish scenario) or resistance (in a bearish one) without violating the overall movement structure.

Anatomy and Specifics of the Butterfly Formation

Unlike the Gartley, the Butterfly pattern is an extension model and often signals the end of the current trend, followed by a deep correction or a complete reversal. Visually, the Butterfly looks more stretched. The key difference lies in the position of point D: it always moves beyond the starting point X. This means the price hits a new local extreme before reversing. According to Scott Carney’s canons, in an ideal Butterfly, point B should be at the 78.6% level of XA, and point D at the 127.2% or 161.8% extension of XA. Such a deep dip beyond the initial impulse often misleads inexperienced market participants, triggering stop-losses and creating the necessary liquidity for a true price reversal.

Fundamental Differences Between the Two Formations

The main divide between the Gartley and the Butterfly lies in the depth of the correction at point B and the final position of point D. If point B stops at 61.8%, we highly expect a Gartley. If the price goes deeper to 78.6%, the market is setting up a Butterfly formation. Psychologically, the Gartley is a cautious retracement that confirms the strength of the main move. The Butterfly, however, is an aggressive attempt by the market to push through a level, which ends in the exhaustion of the attacking side. It is critical for an analyst to wait for confirmation at point B, as it dictates the subsequent target expectation. Misidentifying the pattern can lead to a premature entry, where a trader expects a reversal from 78.6% (Gartley) while the price is actually aiming for 127.2% (Butterfly).

Entry Rules and Stop-Loss Placement

Trading these patterns requires discipline when working with the Potential Reversal Zone (PRZ). In the Gartley pattern, the stop-loss is traditionally placed behind point X, as breaking it completely invalidates the model. In the Butterfly pattern, since point D is already beyond X, the stop-loss is placed beyond the nearest Fibonacci extension level (for example, beyond the 161.8% level if the entry was at 127.2%).