Bollinger Band Width (BBWidth)
Last updated
Last updated
This indicator is derived from Bollinger Bands. John Bollinger refers to Bollinger Band Width as one of two indicators that one can derive from Bollinger Bands; the other indicator is %B. The Band Width measures the percentage difference between the upper and the lower band. It decreases as Bollinger Bands narrow, and increases as they widen. Since Bollinger Bands are based on the standard deviation, falling Band Width reflects decreasing volatility and rising Band Width reflects the opposite.
John Bollinger uses the Band Width to recognize rising and falling trends. Most trends have their origins within sideway market movements that generally have a low volatility. If a breakout is accompanied by a sudden rise in the Band Width, this means that there is definite support for the move.
VTAD:
Book "Technische Indikatoren - simplified" by Oliver Paesler (German only)
double
When using the method with an index (e.g. BBWidth(2, 20)[int barsAgo] ), the value of the indicator will be outputted for the referenced bar.
inSeries Input data series for the indicator
period Number of bars included in the calculation
numStdDev Standard deviation