Bollinger Bandwidth Delta oscillator displays a relative width of Bollinger Bands for a specified period of time.

There are five inputs:

  • BB period - Bollinger Bands calculation period
  • BB deviation - Bollinger Bands deviation value
  • Delta period - indicator calculation period
  • Applied price
  • Show data in percentage - display calculated correlation of the bands width in % (Yes/No)

Calculation:

  • In %:

    BBD = 100.0 * (Bandwidth-DeltaBandwidth) / DeltaBandwidth

  • In points:

    BBD = (Bandwidth-DeltaBandwidth) / Points

where: 

Bandwidth = 2.0 * BB deviation * StdDev/MA
DeltaBandwidth - Bandwidth Delta value 'period' bars ago
StdDev - Standard Deviation(Applied price,BB period)
MA = SMA(Applied price,BB period)

Fig. 1. Bollinger Bandwidth Delta in points

Fig. 2. Bollinger Bandwidth Delta in %