BollingerBandWidth Code

• 02/11/2020 at 5:29 PM #119328
  MajorBasse

  Is it possible to define what standard deviation the BollingerBandWidth should be based upon in ProBackTest?

  The code in ProBackTest is “BollingerBandWidth[x](close)” where X is the amount of periods used to calculate the bandwidth.

  But I would also like to define the standard deviation the bandwidth is calculated with, is this possible?

  For example: “BollingerBandWidth[20, 3](close) where 3 is the deviation.

  

  MajorBasse

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  02/11/2020 at 6:21 PM #119331
  Vonasi

  There you go:

  p = 20 m = 3 bbmid = average[p](close) bbupper = bbmid + (std[p](close)*m) bblower = bbmid - (std[p](close)*m) bbwidth = bbupper - bblower return bbwidth

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  p = 20 m = 3   bbmid = average[p](close)   bbupper = bbmid + (std[p](close)*m) bblower = bbmid - (std[p](close)*m)   bbwidth = bbupper - bblower   return bbwidth

   

  

  Vonasi

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  02/11/2020 at 6:36 PM #119333
  Vonasi

  Something to consider is calculating the bollinger band width as a percentage of the mid line value.

  p = 20 m = 2 bbmid = average[p](close) bbupper = bbmid + (std[p](close)*m) bblower = bbmid - (std[p](close)*m) bbwidth = bbupper - bblower bbwidthperc = (bbwidth/bbmid)*100 return bbwidthperc

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  p = 20 m = 2   bbmid = average[p](close)   bbupper = bbmid + (std[p](close)*m) bblower = bbmid - (std[p](close)*m)   bbwidth = bbupper - bblower   bbwidthperc = (bbwidth/bbmid)*100   return bbwidthperc

   

  

  Vonasi

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  02/11/2020 at 7:54 PM #119345
  MajorBasse

  Thank you very much for the quick help Vonasi!

  

  MajorBasse

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