Bollinger Bands BB Forex Indicator
Bollinger Bands BB Forex Indicator is similar to Envelopes. The only difference is that the bands of Envelopes are plotted a fixed distance (%) away from the moving average, while the Bollinger Bands are plotted a certain number of standard deviations away from it. Standard deviation is a measure of volatility, therefore Bollinger Bands adjust themselves to the market conditions. When the markets become more volatile, the bands widen and they contract during less volatile periods.
Bollinger Bands are usually plotted on the price chart, but they can be also added to the indicator chart (Custom Indicators). Just like in case of the Envelopes, the interpretation of the Bollinger Bands is based on the fact that the prices tend to remain in between the top and the bottom line of the bands. A distinctive feature of the Bollinger Band indicator is its variable width due to the volatility of prices. In periods of considerable price changes (i.e. of high volatility) the bands widen leaving a lot of room to the prices to move in. During standstill periods, or the periods of low volatility the band contracts keeping the prices within their limits.
The following traits are particular to the Bollinger Band:
- abrupt changes in prices tend to happen after the band has contracted due to decrease of volatility.
- if prices break through the upper band, a continuation of the current trend is to be expected.
- if the pikes and hollows outside the band are followed by pikes and hollows inside the band, a reverse of trend may occur.
- the price movement that has started from one of the band’s lines usually reaches the opposite one. The last observation is useful for forecasting price guideposts.
Calculation:
Bollinger bands are formed by three lines. The middle line (ML) is a usual Moving Average.
ML = SUM [CLOSE, N]/N
The top line, TL, is the same as the middle line a certain number of standard deviations (D) higher than the ML.
TL = ML + (D*StdDev)
The bottom line (BL) is the middle line shifted down by the same number of standard deviations.
BL = ML — (D*StdDev)
Where:
- N — is the number of periods used in calculation;
- SMA — Simple Moving Average;
- StdDev — means Standard Deviation.
StdDev = SQRT(SUM[(CLOSE — SMA(CLOSE, N))^2, N]/N)
It is recommended to use 20-period Simple Moving Average as the middle line, and plot top and bottom lines two standard deviations away from it. Besides, moving averages of less than 10 periods are of little effect.
Bollinger Bands BB Forex Indicator sell signal
Bollinger Bands BB Forex Indicator buy signal
What does Forex Indicator mean?
A forex indicator is a statistical tool that currency traders use to make judgements about the direction of a currency pair’s price action. Forex indicators come in many types, including leading indicators, lagging indicators, confirming indicators and so on. Popular forex indicators include moving averages, relative strength index (RSI) and average true range (ATR). A forex trader must choose the indicators that fit his or her trading strategy.
How to install Bollinger Bands BB Forex Indicator?
- Download Bollinger Bands BB Forex Indicator.zip
- Copy mq4 and ex4 files to your Metatrader Directory / experts / indicators /
- Copy tpl file (Template) to your Metatrader Directory / templates /
- Start or restart your Metatrader Client
- Select Chart and Timeframe where you want to test your forex indicator
- Load indicator on your chart
How to uninstall Bollinger Bands BB Forex Indicator?
To shut down an indicator, one has to remove it from the chart. At that, its drawing and recalculation of its values will stop. To remove an indicator from the chart, one has to execute its context menu commands of “Delete Indicator” or “Delete Indicator Window”, or the chart context menu command of “Indicators List – Delete”.
Download Free Bollinger Bands BB Forex Indicator