Free download of the 'Welch Bollinger Band ® Width' indicator by 'maj1es2tic' for MetaTrader 4 in the MQL5 Code Base, 2011.08.08
Bollinger Bands Width Explained
Bollinger Band Squeeze [ChartSchool]
Bollinger Band Width Delta Oscillator ⋆ Top MT5 Indicators {mq5 & ex5} ⋆
BB-Width Indicator and Breakouts
Bollinger Band Width
Bollinger Bandwidth Indicator – 3 Trading Strategies
Script Spotlight: Bollinger Band Width
Bollinger Bands Width Indicator Explained