Bollinger Bands Example


When the bands tighten during a period of low volatility, it raises the likelihood of a sharp price move in either direction. Watch out for a false move in opposite direction which reverses before the proper trend begins. In many cases, it is important to understand that when a price hits the respective Bollinger bands, this does not indicate oversold or overbought conditions. You can always modify this setting according to your trading preferences.


This scan finds that have just moved below their lower Bollinger Band line. M-Tops were also part of Arthur Merrill’s work that identified 16 patterns with a basic M shape. Bollinger uses these various M patterns with Bollinger Bands to identify M-Tops, which are essentially the opposite of W-Bottoms. According to Bollinger, tops are usually more complicated and drawn out than bottoms. Double tops, head-and-shoulders patterns, and diamonds represent evolving tops. Investopedia requires writers to use primary sources to support their work.

Bollinger Band Breakout Strategy

The %B Oscillator converts Bollinger Bands into an oscillator. The way it works is it takes the upper band and assigns it a value of 100 and the lower band and assigns it a value of zero. Every day the price is somewhere usually between those upper and lower bands. In this calculation the moving average and the standard deviation should use the same number of bars in their calculation. Consider talking to a financial advisor about the benefits of using a technical analysis approach and how to interpret Bollinger Bands.

bollinger band

As a result, after adding up, we get the average absolute deviation. This amount is divided by the period for which the data was collected, and then we extract the root of the resulting value. Additionally, you can also use Bollinger Bands as one indicator that can help your trading journey in the cryptocurrency market.

How to use Bollinger Bands

If it lengthens or shortens, the number of standard deviations should also be increased or decreased. For example, for fifty periods it is better to use a ratio of 2.1, and for 10 periods – 1.9. Bollinger bands using the standard configuration of a 20-period simple moving average and bands two standard deviations from the mean is known as a setting. Practically all trading software will allow you to adjust this configuration, including a change from a simple moving average to an exponential moving average.

If you want a system that trades less often, use a wider Bollinger Band, and you’re going to get higher average profit per trade, but much fewer trades. In AmiBroker, just edit the settings on the chart by right clicking on the chart and selecting parameters. You can see that we’ve got the periods which is the number of days, and the width which is the standard deviation multiple. However in mean reversion trading systems, you’ve got to make sure that it’s not a new trend. You don’t want to short a breakout when a strong trend is forming in the direction of the breakout because you could end up with the position moving a long way against you.

How to use Bollinger Bands?

Quite often, this rollback completes near the previous local low. The retest price must be greater than or equal to the price of the first low. To check whether it is met, you can use the previously discussed %b indicator, which allows you to accurately measure the position of candles relative to Bollinger bands. As for the interaction of the W-bottom with the BB, in most cases the left side of the pattern will touch the lower line or cross it.

  • The upper Bollinger band is constructed by moving 2 standard deviations above the 20-day moving average.
  • I am going to explain everything you need to know about the Bollinger Band indicator so that you can start using it to improve your trading.
  • The Bollinger Band chart below is plotted in AmiBroker, and I’ve got the daily stock chart of a stock called Afterpay in Australia.
  • Price exceeded the upper band in early September to affirm the uptrend.
  • Since the SMA is essentially an average and the price keeps swinging from one side of the SMA to the other, you are bound to end up with a profit.

90% of price actions are settled between upper bands and lower bands. Traders assume that breakout between both these bands is a significant moment of trading. The risks of loss from investing in CFDs can be substantial and the value of your investments may fluctuate. 75% of retail client accounts lose money when trading CFDs, with this investment provider. You should consider whether you understand how this product works, and whether you can afford to take the high risk of losing your money. Bollinger Bands present a framework for determining whether prices are high or low on a relative basis.

Defining the Indicators

This scan divides the difference between the upper band and the lower band by the closing price, which shows BandWidth as a percentage of price. In general, BandWidth is narrow when it is less than 4% of price. Chartists can use higher levels to generate more results or lower levels to generate fewer results. After the surge above 40, the stock again moved into a consolidation phase as the bands narrowed and BandWidth fell back to the low end of its range. Another setup was in the making as the surge and flat consolidation formed a bull flag in July.

However, the reaction highs are not always equal; the first high can be higher or lower than the second high. suggests looking for signs of non-confirmation when a security is making new highs. First, a security creates a reaction high above the upper band.

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The growth following the local low will again return the candles to the inner zone of the bands. In this case, the crossing of the moving average of the indicator should occur. M5, W12 – in classic technical analysis, these are expanding triangles – the trend is determined after the breakout. М13, W4 – in classical technical analysis these figures are called triangles. The direction of movement is determined by the side of the exit from the figure. In the second “Style” tab, you can set the color of the Bollinger bands, the moving average, and the chart area between them.

The simplest solution to the first problem is a Bollinger filter. In the chart, the green oval marks the moment when the Bollinger Bands narrow, i.e. the market volatility decreases to a local minimum. As you can see, a sharp upside breakout occurs after this, which is the start of a bullish trend. The number of values ​​corresponds to the calculated period. If 10 cells are filled in, the calculation will correspond to a moving average with a period of 10. Starting then, Bollinger finally decided to be part of the world of stock trading.

Systematic trading and backtesting your idea is the way to build that confidence. Let’s now have a look at what happens with the number of periods. The Bollinger Band chart below is plotted in AmiBroker, and I’ve got the daily stock chart of a stock called Afterpay in Australia. In this one article my goal is to make you an expert on Bollinger Bands. Not quite sure what they are or how you use them to improve your trading?

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The trend when we are talking about a true trend is always supported by the high volumes. When the price is close to the lower or upper band, you can pay attention to the volumes’ indicator. If you look closely at the screenshot we have posted above you can see that there is a hammer signal indicating that the price is likely to start growing.

period simple moving

The below is of American Express from the start of 2008. In a couple of instances, the price action cut through the centerline , but for many traders, this was certainly not a buy signal as the trend wasn’t broken. By default, the overlay uses a 20-period SMA and sets the bands 2.0 standard deviations above or below the SMA.

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