Bollinger Bands Wide & Narrow
* Bollinger Bands Wide & Narrow apply a Simple Moving Average (SMA) on Bollinger Bands Width with same period of middle bands to regconize the bands are widening or narrowing.
* "Bands Widening" is marked by green shade.
* "Bands Narrowing" is marked by red shade.
* "Bands Widening" is marked by green shade.
* "Bands Narrowing" is marked by red shade.