Bat pattern — harmonic X-A-B-C-D with entry at 0.886 of the XA leg

The Bat is one of the most precise harmonic formations, described by Scott Carney in 2001 as an addition to the family started by the classic Gartley. At first glance the two patterns look identical — the same five-point M or W drawn on a chart — but the Bat is set apart by a single level: the deep 0.886 retracement at its entry point. That is exactly what makes it a formation with unusually favourable risk. Below I explain how to recognise it and how to trade it.

What the Bat pattern is and where it came from

The Bat is a five-point reversal formation labelled X-A-B-C-D, which Scott Carney introduced in 2001 and later developed across his harmonic trading series. It belongs to the same family as the Gartley, butterfly and crab, but it has its own strictly defined set of Fibonacci ratios. Carney treats it as a continuation pattern after a pullback: it appears when a market retraces deeply within an existing trend and then turns back to the dominant direction.

Understand this formation as part of a wider logic. If you are just starting out, work through the basics of trading harmonic patterns first — they all rest on the same relationships between swings and differ only in the specific retracement and extension levels.

Structure and Fibonacci levels

"Harmonic patterns identify price relationships using Fibonacci ratio analysis to define precise turning points in the market." — Scott M. Carney, Harmonic Trading, Volume One, Pearson, 2010

The formation is made of five points joined by four legs: X-A, A-B, B-C and C-D. The X-A leg is the longest, initial move that defines the entire span of the pattern. The A-B leg is a pullback that ends point B at a retracement smaller than 0.618 of the XA leg — according to Carney, ideally at 0.500 or 0.382. This shallow pullback is the Bat's first signature, because the Gartley requires a deeper 0.618 here.

Then comes the B-C leg, which gives an extension of at least 1.618 and, in extreme cases, up to 2.618 of the A-B leg. The final segment, the C-D leg, leads to the most important level of the whole formation: point D completes at a 0.886 retracement of the XA leg. Carney calls precisely this level the defining element of the potential reversal zone. At the same spot an AB=CD should complete — an equality of leg lengths measured from the end. To locate these levels you use the same tools as for Fibonacci extensions when projecting targets.

How to recognise the formation step by step

Step 1 — find the X-A leg and the trend context

Start with a clear impulsive move that defines the X-A leg. Point X is the start of the whole structure, and point A is its high or low. The Bat works best with the dominant trend, as a signal of a return to it after a deeper pullback, so first judge the direction on a higher timeframe.

Step 2 — check the shallow point B and the B-C extension

Measure whether the A-B pullback ends point B below 0.618 of the XA leg — ideally at 0.500 or 0.382. If it lands exactly at 0.618, you probably have a Gartley, not a Bat. Then check that the B-C leg gives an extension between 1.618 and 2.618 of the A-B leg.

Step 3 — confirm point D at 0.886 of the XA leg

The crucial measurement: the C-D retracement should halt exactly at the 0.886 retracement of the XA leg. There, check that the AB=CD completes. The convergence of both measurements marks the entry zone — and that is your point D, not any earlier level.

Entry, stop and targets — a hypothetical example

Take the setup from the table above. Once price reaches the D zone around 1.0823, do not enter blindly at the 0.886 level — wait for confirmation from price: a reversal candle, a hammer, or a bullish engulfing in the D zone, and only then open the long. The stop goes just beyond point X, slightly below 1.0800: if the market breaks the XA extreme, the whole structure falls apart, so that is the natural invalidation level.

Set targets conservatively: the first take profit is the 0.382 retracement of the A-D leg, the second around 0.618. Because the deep entry at point D sits close to point X, the distance to the stop is small, and the realistic risk-to-reward ratio usually lands near one to two or better. Remember, though: the figures above are illustrative and show the logic, not a forecast.

The most common mistakes when trading the Bat

1. Confusing the Bat with the Gartley — accepting point B at 0.618 of XA instead of the required 0.382 or 0.500, which throws off the entire entry measurement.
2. Entering before point D completes, while price has not yet reached the 0.886 retracement of the XA leg — opening the position early is a classic error.
3. Skipping price confirmation and entering the Fibonacci level itself, with no reversal candle in the D zone.
4. Setting the stop too tight, right at point D — the reversal zone is often tested by wicks, so the stop belongs at point X, not at the entry zone itself.
5. Trading against the dominant trend — the Bat makes sense as a return to the trend after a pullback, not as an attempt to catch tops and bottoms across the market.

How the Bat differs from other harmonic patterns

The Bat's closest relative is the Gartley — both end the entry on a retracement of the XA leg, but the Bat goes deeper, to 0.886 instead of 0.786, and requires a shallower point B (you can follow those ratios in the guide to the Gartley and Bat patterns). The butterfly pattern and the crab pattern, in turn, belong to the group of extension patterns: their point D falls beyond point X, at 1.27 or even 1.618 of the XA leg. That is the fundamental difference — the Bat and Gartley are retracement patterns, in which D sits inside the XA leg, whereas the butterfly and crab are breakout patterns that extend past it.

From a practical standpoint, the Bat's deep entry gives it an edge over the Gartley precisely in risk-to-reward: the closer to point X the formation completes, the tighter a stop you can set while keeping the same targets.

Who this pattern is for

Let us be honest: the Bat is not a beginner's formation. It demands precise measurements, and on a historical chart it is easy to convince yourself the ratios "fit" when they are really being stretched. Before you reach for it, get a solid grip on support and resistance, on price action, and on the broader technical analysis behind these tools. Plain Fibonacci retracements are another good foundation — without reading those levels fluently, the measurements in the Bat are just guesswork. Treat it as a complementary tool, best combined with an oscillator divergence and a clear support or resistance level in the D zone, rather than a standalone system.

What to do tomorrow to start learning the Bat pattern

1. Open TradingView on EUR/USD in the hourly timeframe and review recent clear pullbacks within a trend, marking points X-A-B-C in turn — this trains you to see the formation's context before any tradable entry signal appears at point D.
2. On each candidate, use the Fibonacci tool to check two things at once: whether point B lands below 0.618 of the XA leg (ideally at 0.500 or 0.382), and whether the retracement to point D halts exactly at the 0.886 of the XA leg.
3. Set up a simple journal with columns for the leg ratios, the entry location, the stop-loss level just beyond point X and the achieved risk-to-reward, then fill it in after every demo trade so you can see what actually works for you.
4. Place a price alert at the 0.886 level of the XA leg on a pair you are watching — when price reaches the D zone you can calmly judge whether a confirming reversal candle is forming, or skip the trade.
5. Complete at least twenty demo trades using the Bat exclusively and document each one with its result — only a repeatable success rate on this precise formation justifies moving it to a live account.