Harmonic patterns Gartley and Bat — differences, entries, stops

Harmonic patterns look on a chart like two letters M or W joined in the middle at a turning point. Two twin variants are by far the most common: the Gartley, described in the 1930s, and the Bat, added by Scott Carney at the start of the 21st century. From a distance they are deceptively alike, yet they differ on two specific Fibonacci ratios, and that is enough to shift the entry, the stop and the target. Here I lay both schemas out side by side, step by step, in the language of an analyst rather than a system salesman.

The shared skeleton of five points

Both belong to the family of XABCD harmonic patterns — sequences of five turning points connected by four legs. The first move, from X to A, defines the frame of the whole schema and is the clearest wave on the chart. It is followed by a correction from A to B, a counter-correction from B to C, and finally the last leg from C to D, which approaches the potential reversal zone. This five-point structure was proposed by H.M. Gartley in Profits in the Stock Market (1935), while the names of the newer variants were introduced by Scott Carney, who tied precise Fibonacci ratios to each point.

At a glance you see a symmetrical M when the pattern is bearish, or a W when it is bullish. Symmetry alone, however, is not enough to classify a setup — two patterns that look almost identical may in fact be different schemas and demand a different trade plan.

What actually separates a Gartley from a Bat

It all comes down to two ratios: where point B sits relative to the XA move, and where point D sits relative to it. In a Gartley point B is near 61.8% of XA, the classic golden retracement, and point D stops around 78.6% of XA — deeper, but clearly above point X. In a Bat point B is shallower, between 38.2% and 50%, while point D drops to about 88.6% of XA — very close to X yet not breaking it. This distinction comes from Carney's work and is used consistently in the nomenclature of harmonic pattern trading, so it pays to stick to these exact numbers.

How to identify each pattern step by step

The best way is to start from the left of the chart and from the clearest directional wave the eye can pick up. That move becomes points X and A — without a clear XA leg the rest of the tool measures against a random line. In an uptrend X is the low and A the high; in a downtrend the order reverses. Then we check the AB correction — if it pulls back near 61.8% of XA, we have a Gartley candidate; if it stops in the 38.2 to 50 percent band, a window opens for the Bat.

The next filter is point C, which in both schemas falls within the wide band of 38.2 to 88.6 percent of the AB correction; on its own it settles nothing, but an extreme C tends to signal the pattern is not "clean". The decisive piece is the last leg, CD, which approaches the potential reversal zone. If it stops at 78.6% of XA, we are in a Gartley; if it reaches 88.6% of XA, the setup qualifies as a Bat. Worth checking with a tool that calculates ratios automatically rather than estimating by eye.

Entry at point D, stop and targets

The entry in both patterns sits in the potential reversal zone around point D, yet a mere touch is only a hypothesis. The cautious approach asks for confirmation from price action — a rejection candle, a long lower wick or an engulfing pattern. The stop loss goes just beyond point D: in the Gartley enough to absorb market noise but not past 0.786 XA, and in the Bat just past 0.886 XA, still ahead of point X. Breaking through X invalidates the assumption.

Profit targets come from retracements of the AD leg. A first, cautious target is 38.2% of AD; the second, primary in most textbooks, is 61.8% of AD, the classic golden level that ties the pattern back to the wider family of Fibonacci retracements. A full correction of AD rarely unfolds in one move; the market usually gets there in waves. It pays to split the position and close it in sequence at the successive levels.

A hypothetical example: bullish Bat on EUR/USD

Suppose an illustrative setup on the EUR/USD daily chart — an illustration of the rules, not a recommendation. A declining wave runs from point X near 1.0950 to point A close to 1.0750, about two hundred pips. Price pulls back to 1.0850, which is 50% of XA — a shallow B fitting the Bat band. The market drops again to 1.0790, where point C sits near 50% of the AB correction, and then climbs to 1.0876, roughly 88.6% of XA, close to X yet not breaking it.

Only around 1.0876 does looking toward a short position make sense. The trader waits for a rejection candle in the 1.0870 to 1.0880 zone. The stop sits just above 1.0955, barely past X. The first target lands near 1.0828, that is 38.2% of the AD retracement; the second, treated as primary, near 1.0797, that is 61.8% of AD. The reward-to-risk ratio measured to the second target is roughly one to two and a half. Were the pattern invalidated, no profit is promised — the schema only organises the decision.

"Harmonic patterns are precise price structures in which the entire sequence is defined by specific Fibonacci ratios, not by general shapes on a chart." — Scott M. Carney, Harmonic Trading, Volume One, Pearson, 2010.

The limits of the method and the honest caveats

It has to be said plainly: identifying harmonic patterns is partly subjective. Where you place points X and A depends on the choice of an obvious wave, and that choice is rarely clear-cut — switching from the four-hour to the daily chart can turn the same zone from noise into a readable setup. StockCharts ChartSchool openly lists subjectivity and time-consuming nature as drawbacks of harmonic patterns even while praising their mathematical precision. Carney stresses that a pattern is only a map, not a signal — the signal emerges only when the D zone converges with other arguments: support or resistance from a higher timeframe, an important moving average or where a prior impulsive wave ended.

The three most common mistakes are trading the touch of point D without confirmation, setting the stop too tight inside the D zone, and "stretching" the early points to make the pattern fit a preconceived view. Each shares the same root: treating the schema as a guarantee rather than a tool that organises the decision.

What to do tomorrow

1. Open the daily chart of the pair you watch most often and find one clear, completed directional move that can be marked as the XA leg, then check whether the correction that followed stopped closer to 50% (a Bat candidate) or closer to 61.8% of XA (a Gartley candidate), so your eye learns the real proportions.
2. Write the criteria for the Gartley and the Bat into your trading plan as hard numbers — B near 61.8% XA and D near 78.6% XA for the first, B between 38.2% and 50% and D near 88.6% XA for the second — and reject look-alike setups that fail the ratios.
3. Adopt the rule that a mere touch of the D zone is a hypothesis, not an entry: an actual entry requires price-action confirmation in the area together with confluence from a higher timeframe, which kills most false signals at the planning stage.
4. Define profit targets from the retracement of the AD leg, splitting the position in two: close the first part at 38.2% of AD as a cautious realisation, run the second to 61.8% of AD, and only in exceptional cases attempt a full retracement near point A.
5. For the next month keep a journal: for every potential pattern record the five points, the classification, whether candlestick confirmation appeared and the outcome, then check whether setups with confluence really do perform better than "clean" patterns without context.

Related reading: Fibonacci retracements are the foundation on which both patterns rest; the Gartley pattern strategy develops a practical trade plan; the Bat pattern strategy shows how to use the deeper point D, and harmonic pattern trading places the topic in the wider XABCD context. For broader background see the technical analysis section on ForexMechanics.com.