how to calculate BollingerBandWidth ?

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • 11/28/2022 at 5:18 PM #204961 quote
    ZeroCafeine
    Participant
    Senior

    Hi everyone,

    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 ?

    A = BollingerBandWidth[20](Close)

BBUp = BollingerUp[20]
BBDown = BollingerDown[20]

D = BBUp - BBDown

Return A, D

    Best Reguards

    11/28/2022 at 5:25 PM #204964 quote
    robertogozzi
    Moderator
    Master

    There you go:

    //
// Bollinger BB%
//
DEFPARAM CalculateOnLastBars = 1000
p       = 20
dev     = 2.0
BollInf = Average[p,0](close) - (dev * std[p](close))
BollSup = Average[p,0](close) + (dev * std[p](close))
pB      = ((close - BollInf) / (BollSup - BollInf)) * 100
return pB AS "Boll BB %",80 AS "Ob",20 AS "Os"
    11/29/2022 at 9:13 AM #204988 quote
    Nicolas
    Keymaster
    Master

    Bollinger B% is not the same as Bollinger BandWidth, as per our documentation: https://www.prorealcode.com/documentation/bollingerbandwidth/

    Calculation :

    Indicator = ((Boll+) – (Boll-)) / moving average

    a = BollingerBandWidth[20](close)
b = (BollingerUp[20](close)-BollingerDown[20](close))/average[20]

return a , b
    ZeroCafeine thanked this post
    11/29/2022 at 11:42 AM #205009 quote
    robertogozzi
    Moderator
    Master

    I misunderstood the text. Sorry.

    ZeroCafeine thanked this post
    12/05/2022 at 1:21 PM #205276 quote
    ZeroCafeine
    Participant
    Senior

    tks you all,

    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,

    tks again,
    Best Reguards

  • Author
    Posts
Viewing 5 posts - 1 through 5 (of 5 total)
  • You must be logged in to reply to this topic.

how to calculate BollingerBandWidth ?


ProScreener: Market Scanners & Detection

New Reply
Author
author-avatar
ZeroCafeine @zerocafeine Participant
Summary

This topic contains 4 replies,
has 3 voices, and was last updated by ZeroCafeine
3 years, 3 months ago.

Topic Details
Forum: ProScreener: Market Scanners & Detection
Language: English
Started: 11/28/2022
Status: Active
Attachments: No files
Logo Logo
Loading...
Do you like cookies? 🍪 We use cookies to ensure you get the best experience on our website. (Learn more)
©2026 ProRealCode - Trading & Coding with ProRealTime™