Recently, I’ve noticed that many traders’ understanding of harmonic patterns still remains superficial. In fact, when used effectively, these patterns can significantly improve the success rate of identifying reversal points. Over the past few years, I’ve repeatedly tested these on charts and found that the logic behind these patterns is quite solid.

Let’s start with the most basic one: the ABCD pattern, which is an entry-level pattern. It consists of three waves and four points—impulse, correction, then impulse again. The length of CD should equal AB, and the retracement of BC usually hits around the 0.618 Fibonacci level. Many traders establish positions at this point or wait until the pattern fully develops before entering.

Next is the Bat pattern, created by Scott Carney, which adds an X point. The retracement at B must precisely hit 50% of XA, and the extension of CD should reach 1.618 or even 2.618 of BC. I think this pattern is more suitable for patient traders because it requires waiting for more specific levels.

The Butterfly pattern, discovered by Bryce Gilmore, centers around the 0.786 retracement of XA, which often accurately locates point B. The Crab pattern, also from Carney, uses a 1.618 extension to identify reversal zones, making it suitable for bottom-fishing or shorting at extreme levels. I personally prefer this one because it provides clearer signals.

There’s also the Gartley pattern, with simple rules: B retraces 0.618, and D retraces 0.786. The Shark pattern involves five waves, with AB retracing between 1.13 and 1.618, and BC being 113% of OX. These harmonic patterns may look complex, but once you master Fibonacci ratios, recognizing them isn’t that difficult.

Finally, I want to mention the Three Drives pattern, which is less common and requires perfect symmetry in price and time. It involves three impulse waves and two retracement points, with the third impulse typically marking the reversal point. The second and third impulses should be extensions of 127.2% or 161.8% of A and C, with retracements usually at 61.8% or 78.6%.

My advice is to start practicing with ABCD and Bat patterns first, as they are relatively easier to identify. Then gradually incorporate Crab and Gartley patterns. Most importantly, don’t force patterns onto your charts; if the data doesn’t match, move on—another opportunity will come. The rules for bullish and bearish harmonic patterns are the same, just mirrored in opposite directions. Many traders get stopped out because they rush into trades before the pattern fully forms.

If you’re interested, you can pick some mainstream cryptocurrencies on Gate and practice identifying these patterns using daily or 4-hour charts. Before trading with real money, it’s best to repeatedly verify on charts to build a sense of pattern recognition.