text: Title: Anti Volume Stop Loss indicator.. requested.
  Body: Hi,
  
  I've read Buff Dormeier's 2011 "Investing w/ Volume Analysis" book at least 3 times, looking for hints in other parts of the book, but the calculation of his Anti-Volume Stop Loss still eludes me. On page 254 Buff says
  
  ```C
  Length = Round (3+VPCI)
  Price = Average (Lows x 1/ VPC x 1 / VPR, Length)
  Standard Deviation = 2 x (VPCI X VM)
  
  AVSL = Lower Bollinger Band - (Price, Length, Standard Deviation)
  ```
  
  Same indicator made by rafka in trading view. 
  Can this be added to library?