someone can tell me how this variable “BollingerBandWidth” is calculated please, because I don’t find the same result with a manual calculation, maybe it’s not the same standard deviations or something is missing, I get A different of D ?
so when I red the fonction’s name of : “BollingerBandWidth” I understood it’s the difference betwen the 2 bollinger band like : BB Up – BB Down, but this is not the case,