I just noticed that many people are starting to be interested in harmonic patterns—what exactly are they? Because it’s one of the best tools I’ve used for Forex trading for a while.

Let me explain what harmonic patterns are: a price analysis technique that uses geometric relationships between price and time. It was invented by Harold McKinley Gartley. It involves using Fibonacci ratios to identify potential reversal zones (PRZ) where the price might turn around, allowing traders to forecast future price movements.

The best thing about harmonic patterns is that they are not guesses but rely on specific Fibonacci numbers. This sequence starts from 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and for trading, important ratios include 0.382, 0.618, 0.786, 1.0, 1.272, 1.618, and others.

There are several main patterns, such as Gartley, Butterfly, Crab, Bat, Shark, and Cypher. Each has different Fibonacci ratios. Once you understand one pattern, it becomes easier to understand the others.

The simplest pattern is ABCD or AB=CD, consisting of 4 points and 3 legs. The market moves in one direction (AB), then reverses (BC), and then moves again in the same direction as AB (CD). When applying Fibonacci retracement on leg AB, leg BC should retrace to 0.618 of AB.

The Gartley pattern is the most common. It provides specific information about both the timing and size of price movements. The Butterfly pattern differs in that point D extends beyond point X, discovered by Bryce Gilmore.

The Bat pattern was developed by Scott Carney in 2001. Its key feature is that the retracement of point B must not exceed 0.50 of leg XA, and point D should end at 0.886 of leg XA.

The Crab pattern is also by Scott Carney. Its most important characteristic is the 1.618 extension of the XA move, which defines the PRZ.

The way to trade with harmonic patterns is to first identify a price movement up or down, then find key reversal levels using Fibonacci ratios, form the pattern, interpret whether it’s a reversal or continuation, and then open buy or sell positions.

The advantage is high accuracy, reliability, and applicability across all assets—whether Forex, stocks, crypto, or gold. The downside is that it’s quite complex and takes time to learn. Sometimes conflicting Fibonacci retracements can make it difficult to pinpoint reversal zones.

I want to emphasize that harmonic patterns are a good tool but should be used together with other indicators like RSI or MACD. Don’t forget to set reasonable stop-losses, usually at point X, and target profits at point C.

Finally, if you trade stocks with harmonic patterns, be cautious of price gaps at open or close, as they can distort the measurement of ratios. Try looking at larger timeframes for more accuracy.