# Trading the Extreme Harmonic Impulse Wave Pattern — The Full Guide.

### Presenting and Trading the Extreme Harmonic Impulse Wave Harmonic Pattern.

Harmonic Patterns are one of the powerful advanced price action techniques that are used to detect reactions. The thing that works about Harmonic Patterns is that they use the confluence method, meaning that they expect reactions from clusters of certain levels defined by Fibonacci retracements. The reason they work has nothing to do with mystic or magic whatsoever, it is simply the fact that Fibonacci retracements are used by many traders and their visibility makes reactions more likely, thus increasing the predictive power of the patterns. However, only using Harmonic Patterns on their own might not be sufficient as we will see below, they are best combined with contrarian indicators to increase the chances of a profitable trade.

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**Introduction to the Fibonacci Sequence**

Leonardo Bonacci, known as Leonardo Fibonacci has developed a sequence out of rabbit mating which formed the basis for many mathematical observations. The sequence follows this distinct pattern:

The numbers are found by adding the previous two numbers behind them. In the case of 13, it is calculated as 8 + 5, hence the formula is:

The beauty of these numbers is a certain ratio, called the golden ratio. If we take any two successive numbers in the sequence, their ratio (Xn / Xn-1) gets closer to 1.618 which is what we call the golden ratio:

It is not important how we got to trading from these patterns as much as how important they are, therefore, we will discuss the ratios from a financial trading perspective. Let us keep the 1.618 in mind as for the moment it is one of the two most important ratios that we will use in trading. Our job now is to find the rest of the significant ratios useful to us in trading. They are all variations of 1.618 and its reciprocal 0.618. Notice how the reciprocal of 1.618 is simply 0.618. A reciprocal is when you divide 1 by the number. The below table summarizes the rest of the ratios and how we got them:

We will now proceed to define the Extreme Harmonic Impulse Wave Pattern and how to detect and trade it.

**The Extreme Harmonic Impulse Wave Pattern**

The Extreme Harmonic Impulse Wave pattern is an interesting configuration that takes advantage of extended moves to detect an imminent reversal level. It is defined as:

**The first leg should retrace back either 113.0% or 161.8%.****The second leg should retrace back either 161.8% or 224.0%**

Here is another example of a bearish Extreme Harmonic Impulse Wave that has provided a reaction. Sometimes, harmonic patterns do provide reversals, but we are not supposed to expect that from them. They are merely used for reactions just unlike the one in the below chart.

The figure above shows a nice reaction after prices reached 224.0%. The Extreme Harmonic Impulse Wave pattern benefits from the time factor as extended moves are bound to correct sometime. It is not that easy to detect nor is it common but when it occurs, it definitely adds value to our trading.

The key retracements to watch out for are 161.8% and 224.0% which is simple the sum of the golden ratio and its reciprocal (61.8% + 161.8%). The conviction for the move around the 161.8% is good but better around 224.0% at the cost of missing out if we choose not to initiate the trade around 161.8%. The pattern is also a building block of another complex pattern that will be seen in a future article.

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**Detecting the Extreme Harmonic Impulse Wave Pattern**

The Extreme Harmonic Impulse Wave Pattern can start to be detected after the reaction following the initial retracement. Therefore, we have enough time to act on it without any hindsight bias or delay. The below plots show how to detect one across time:

The first step above is detecting the initial wave that should be either 113.0% or 161.8% and then waiting for the reaction to the upside which should trend clearly. In the above plot, we can see two candidates for an initial level, both have retraced back 161.8%.

Now, we can even draw the pattern. All we need is the expected reaction from the C point defined as the 161.8% of the bigger pattern or the 224.0% of the smaller pattern which are coincidentally around the same zone.

And finally, we should manage the reaction according to the risk management measures outlined in the last part of the article.

**Combining the Extreme Harmonic Impulse Wave with the RSI**

Having an Extreme Harmonic Impulse Wave Pattern at its C point (pending reaction) and an RSI around extremes or in divergence is a good confirmation of the trade and is a conviction enhancer. But what is the Relative Strength Index?

The RSI is without a doubt the most famous momentum indicator out there, and this is to be expected as it has many strengths especially in ranging markets. It is also bounded between 0 and 100 which makes it easier to interpret. Also, the fact that it is famous, contributes to its potential.

This is because the more traders and portfolio managers look at the RSI, the more people will react based on its signals and this in turn can push market prices. Of course, we cannot prove this idea, but it is intuitive as one of the basis of Technical Analysis is that it is self-fulfilling.

The RSI is calculated using a rather simple way. We first start by taking price differences of one period. This means that we have to subtract every closing price from the one before it. Then, we will calculate the smoothed average of the positive differences and divide it by the smoothed average of the negative differences. The last calculation gives us the Relative Strength which is then used in the RSI formula to be transformed into a measure between 0 and 100.

**Risk Management on the Extreme Harmonic Impulse Wave Pattern**

Trading on the patterns requires touching the implied reversal zone, also referred to as Potential Reversal Zone — PRZ. A basic rule of thumb that we can follow when trading is to place two targets with the first one being at 38.2% of the top to bottom (or bottom to top) retracement and the second one being at 61.8%. The stop will be placed at half the distance between the entry and the second target thus ensuring a 2.0 risk reward ratio. I generally take half the profits at the first target and move the stop to breakeven, that way I ensure that the trade never loses money in case the price comes back unfavorably. Below is an example on the simples of Harmonic Patterns, the ABCD pattern showing clear risk management.

**Conclusion**

Contrarian trading using price action and indicators is a powerful tool to profit from intermediate market reactions. As is known, no strategy is perfect but with proper risk management, a good strategy will last long and provide the expected outcome. We need to always be aware of any fundamentals when trading the patterns on the higher time frame like Weekly charts as we all know, fundamentals are what push prices over the long-term horizon. Also, on the short-term, we need to be always aware of any expected news of economic releases that may induce short-term noise. Technical Analysis does not work when everyone is panicking or hopping on euphoria. It is a tool for normality combined with a slightly statistical extreme.