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ZigZag indicator: what is it and how to use it?

19:50, 30 March 2018

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The ZigZag indicator is a technical analysis tool that can be used to identify classic charting patterns in trading. It is designed to highlight important trends and confirm possible price reversals. It eliminates price noise that is not significant for the trader's analysis.

The late investor John Templeton once said that “the time of maximum pessimism is the best time to buy and the time of maximum optimism is the best time to sell”. This is the simple concept behind the ZigZag indicator.

It aims to assist traders to stay in a winning position and avoid the urge to close positions on the minor reactions that are commonplace in the market. It shows where trends might change. And it is a starting point for deciding where to place stops on momentum-based trades, allowing traders to lock in profits when a trend matures.

What is ZigZag trading?

Most chart indicators work on averages. A by-product of this is that they smooth away valuable information such as price swings that can present trading opportunities.

A zigzag trading system uses both swing highs and lows in its calculations to identify significant trends and changes in market prices. These swings occur when a price at close is either higher or lower than the price previous to it and after it.

The basis of any swing charting such as ZigZag is the threshold. It helps filter out small and inconsequential reversals by setting a threshold at which reversals in price are deemed to be significant.

Stock market chartThe basis of any swing charting such as ZigZag is the threshold. Source: Shutterstock.com

Users can set the percentage move that will generate a change in the zig signal and the chart will not update until a minimum price movement is reached. For example, a 5% ZigZag line will filter out and ignore any move that is smaller than 5% in magnitude.

The ZigZag trading strategy can use both percentages and points in its construction. To construct the ZigZag indicator, there must be a certain percentage or number of points between a swing high and a swing low before a line will be drawn.

Most ZigZag indicators have three settings as follows:

  • Depth:  how far back in the chart bar series it will look.
  • Deviation: percentage deviation before it reverses the trend and a Zig becomes a Zag.
  • Backstep:  the minimal amount of bars between swing highs and lows.

How to use a ZigZag trading strategy?

The ZigZag indicator is similar to a moving average in that they both signal a trend change when the indicator changes direction such as when aggregate price rises become price falls. However, a ZigZag indicator highlights the peaks and troughs as they happen whereas a moving average responds slowly to changes in price that can produce a delay.

Using a ZigZag trading strategy is also useful when a trader wants to look at a trend over a longer period of time. This can be done by changing the resolution or scale of features that are detected, making the overall path of the market more visible.

It is important to remember that the ZigZag feature has no predictive power because it draws lines based on hindsight. Any predictive power will come from applications such as Elliott Wave, price pattern analysis or indicators. Chartists can also use the ZigZag with retracements feature to identify Fibonacci retracements and projections.

 

Elliott Wave TheoryThe ZigZag indicator is commonly used when trading with the Elliot Wave Analysis. Source: Shutterstock.com

The ZigZag indicator and Elliott Wave Theory

Many swing trading strategies involve trying to catch and follow a short trend. Yet, there are times when it is more beneficial to trade counter to the trend. For example, an early part of a trend can be followed by a period of retracement, before the trend resumes. A counter-trend trader would try to catch the swing in this period of reversion.

This is why the ZigZag indicator is commonly used when trading with the Elliot Wave Analysis. This is a technical analysis that describes the natural rhythm of crowd psychology in the market that manifests itself in waves.

The Elliott wave theory was developed by Ralph Nelson Elliot in the 1930s as a way to characterise the movements of the stock market as a series of repetitive waves, or patterns, with specific characteristics.

After studying many stock charts, Elliott noticed that price trends don’t progress in straight lines, but rather they evolve as a series of steps. Often three steps forward, in the direction of the trend and two steps back.

Elliott assumed these movements to be driven by human emotion, such as fear and greed. During the trending phases, the crowd psychology is shifting back and forth between optimism and pessimism and that a trend will ultimately push in one dominant direction.

Business man on a ladderElliott assumed these movements to be driven by human emotion, such as fear and greed. Source: Shutterstock.com

The biggest challenge though with the Elliott theory is defining where the waves start and where they end. The ZigZag strategy helps detect the peaks and troughs and this gives a more solid basis to any strategy working on the Elliott wave principle.

The aim then is to start to forecast how the trend is likely to develop. There will always be cycles that are just starting or haven’t yet completed.

Identifying Fibonacci retracements and projections

Fibonacci retracements are levels that designate points where a price has a high probability of reversing. Similar to support and resistance levels, the points are drawn automatically through the use of the Fibonacci Retracement tool.

Adding the ZigZag indicator shows where all the upswings and downswings have taken place as well as where they begin and end.

Limitations of ZigZag trading

Many analysts believe the ZigZag indicator should not be used as a tool for actively trading the market as the indicator only shows what the price has been doing in the past. As the values are plotted after the price closes, the last leg of the zigzag is constantly changing.

It is more important to use it as an alert system to give further scrutiny to a trend or to monitor the health of the primary trend.

Another issue is that markets often do the unexpected. Like all technical indicators, ZigZag has no way of accounting for unforeseen events or disruptions that cause unexpected changes in the market.

Whether used alone or in combination with other techniques, the ZigZag indicator is a useful tool that traders should test within their own technical analysis approach.

When used alongside other technical based analysis it allows for some overlapping confirmation to the market movements. In this way, the ZigZag feature can highlight price patterns that might not be as visible on a normal bar or line chart.

Capital Com is an execution-only service provider. The material provided on this website is for information purposes only and should not be understood as an investment advice. Any opinion that may be provided on this page does not constitute a recommendation by Capital Com or its agents. We do not make any representations or warranty on the accuracy or completeness of the information that is provided on this page. If you rely on the information on this page then you do so entirely on your own risk.

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