To use the method, a trader will benefit from a chart platform that allows the trader to plot multiple Fibonacci retracements to measure each wave.
The Visual Patterns and How to Trade Them
There is quite an assortment of harmonic patterns, although there are four that seem most popular. These are the Gartley, butterfly, bat and crab patterns.
The Gartley was originally published by H.M. Gartley in his book Profits in the Stock Market and the Fibonacci levels were later added by Scott Carney in his book The Harmonic Trader.
|Figure 1: The Gartley Pattern
The bullish pattern is often seen early in a trend, and it is a sign the corrective waves are ending and an upward move will ensue at point D. All patterns may be within the context of a broader trend or range and traders must be aware of that (see Elliott Wave Theory). Point D is a 0.786 correction of the XA wave, and it is a 1.27 or 1.618 extension of the BC wave. The area at D is known as the potential reversal zone (PRZ). This is where long positions could be entered, as some price confirmation of reversal is encouraged. A stop is placed just below the PRZ.
|Figure 2: The Butterfly Pattern
The butterfly pattern is different than the Gartley in that it focuses on finding reversals at new lows (bullish) or new highs (bearish). D is a new low and a potential reversal point if the Fibonacci figures align with the structure. D would need to be an extension of BC in the magnitude of 1.618 or 2.618. This should align with an extension of XA in the magnitude of a 1.27 or 1.618. Entry is taken near D with price confirmation of the reversal encouraged. Stops are placed slightly below the potential reversal area (bullish).
|Figure 3: The Bat Pattern
The bat pattern is similar to Gartley in appearance, but not in measurement. Point B has a smaller retracement of XA of 0.382 or 0.50 (less than 0.618), but the extension of the BC wave into D is at minimum 1.618 and potentially 2.618. Therefore, D will be a 0.886 retracement of the original XA wave. This is the PRZ: when selling has stopped and buying enters the market, enter a long position and take advantage of the bullish pattern. Place a stop just below the PRZ.
|Figure 4: The Crab Pattern
The crab is considered by Carney to be one of the most precise of the patterns, providing reversals in extremely close proximity to what the Fibonacci numbers indicate. This pattern, similar to the butterfly, looks to capture a high probability reversal at a new (recent) low or high (bullish or bearish respectively). In a bullish pattern, point B will pullback 0.618 or less of XA. The extension of BC into D is quite large, from 2.24 to 3.618. D (the PRZ) is a 1.618 extension of XA. Entries are made near D with a stop-loss order just outside the PRZ.
Fine-Tuning Entries and Stops
Each pattern provides a PRZ. This is not an exact level, as two measurements - extension or retracement of XA - creates one level at D and the extension of BC creates another level at D. This actually makes D a zone where reversals are likely. Traders will also notice that BC can have differing extension lengths. Therefore, traders must be aware of how far a BC extension may go. If all projected levels are within close proximity, the trader can enter a position at any area. If the zone is spread out, such as on longer-term charts where the levels may be 50 pips or more apart, it is important to wait to see if the price reaches further extension levels of BC before entering a trade.
Stops can be placed outside the largest potential extension of BC. In the crab pattern, for example, this would be 3.618. If the rate reversed before 3.618 was hit, the stop would be moved to just outside the closed Fibonacci level to the rate low (bullish pattern) or rate high (bearish pattern) in the PRZ.
Figure 5 is an intra-day example of a butterfly pattern from May 3, 2011.
|Figure 5. Bearish Butterfly Pattern - EUR/USD, 15 Minute
The price touches almost exactly the 1.618 extension level of XA at 1.4892 and the extension of BC to 2.618 is very close at 1.4887 (there are two Fibonacci tools used, one for each wave). This creates a very small PRZ, but it may not always be the case. Entry is taken after the rate enters the zone and then begins to retreat. The stop is placed just outside the most significant level that was not reached by the rate, in this case a few pips above the 1.618 XA extension. Targets can be based on support levels within the pattern; therefore, an initial profit target would be just above point B. (Crowd psychology is the reason this technique works. Find out how to make it work for you. To learn more, refer to Candlesticks Light The Way To Logical Trading.)
The Bottom Line
Harmonic trading is a precise and mathematical way to trade, but it requires patience, practice and a lot of study to master the patterns. Movements that do not align with proper pattern measurements invalidate a pattern and can lead traders astray. The Gartley, butterfly, bat and crab are the better-known patterns that traders can watch for. Entries are made in the potential reversal zone when price confirmation indicates a reversal, and stops are placed outside the nearest significant (for the pattern) Fibonacci level that was not hit by the BC or XA extensions/retracements into the D (PRZ) area. (All trading platforms have benefits and drawbacks - master the fake trade before making a real one.
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