John Bollinger’s Official Bollinger Band Website

bollinger bands

Conversely, if they continuously touch the lower band, prices are thought to be oversold. According to Bollinger, his namesake indicator is not just for stocks, but can also be used for futures, commodities, and currency trading. In addition, Bollinger Bands are time frame agnostic, meaning they apply to all time period charts. Bollinger Band Width is derived from Bollinger Bands and measures the
percent difference between the upper and lower bands.

bollinger bands

It is at this stage that breakout traders might pay attention. The two standard deviation width of the channel means that the statistical probability of price hitting the bands given the price range of the past 20 periods is only about 5 percent. However, like any statistical measure, it assumes that all elements of the sample, in this case, the 20 periods, are the same. You can see that the Bollinger Bands ® are a multi-faceted trading indicator that can provide you with lots information about the trend, buy/seller balances and about potential trend shifts. Together with the moving average and the RSI, Bollinger Bands ® make for a great foundation for a trading strategy.

Bollinger Bands app

Besides his extensive derivative trading expertise, Adam is an expert in economics and behavioral finance. Adam received his master’s in economics from The New School for Social Research and his Ph.D. from the University of Wisconsin-Madison in sociology. He is a CFA charterholder as well as holding FINRA Series 7, 55 & 63 licenses. He currently researches and teaches economic sociology and the social studies of finance at the Hebrew University in Jerusalem. A tool developed by Bollinger to help in the recognition of systemic pattern recognition in prices.

As the overall trend was bearish and the price was near the upper Bollinger Band (1), a decline would have likely occurred. At the same time, the stochastic oscillator bollinger bands was in the overbought area (2), which was another alert of a potential drop in price. A trader could have gone short once the price fell below the middle line (3).

Level 1 vs. Level 2 Market Data

When price moves close to the lower band, the current price is considered low relative to recent prices. If they cross the lower band, traders consider the instrument to be oversold. When price action is close to the upper band, the current price of the instrument is considered high relative to recent prices. If they cross the upper band, traders consider the instrument to be overbought. Still, have a tendency to produce false signals.

In other words, Bollinger Bands are reactive, not predictive, and are often referred to as a lagging indicator​, rather than leading. The bands widen during volatile periods and contract during non-volatile periods. Bollinger Bands typically use a 20-period moving average, where the “period” could be 5 minutes, an hour or a day. By default, the upper and lower bands are set two standard deviations above and below the moving average. However, traders can customize the number of periods in the moving average as well as the number of deviations. For such reasons, it is incorrect to assume that the long-term percentage of the data that will be observed in the future outside the Bollinger Bands range will always be constrained to a certain amount.

Bollinger Band Stop-Losses

Like Bollinger Bands, Stochastic indicators can help traders identify overbought and oversold levels. Financial traders employ these charts as a methodical tool to inform trading decisions, control automated trading systems, or as a component of technical analysis. This can provide a strategy for range-bound markets, with the trader going long when price touches the lower band and short when it touches the top band. However, when a stock is moving in a strong trend, these signals may not work as well. Trending prices can continue to “walk” along the upper or lower bands for an extended time.

  • They shouldn’t be considered a perfect indicator when it comes to predicting a stock’s future moves.
  • However, this method works in a ranging market and on high timeframes.
  • Traders can apply Bollinger Bands to various timeframes, such as daily, hourly, or minute charts.
  • However, it’s worth remembering that it may take time to reach the opposite line.
  • Using the default parameters of a 20-period look back and plus/minus two standard deviations, bandwidth is equal to four times the 20-period coefficient of variation.
  • Expanding volume on a breakout is a sign that traders are speculating that the price will continue to move in the breakout direction.






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