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Re: [amibroker] Adjustable Bollinger Bands



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Dimitris
Very interesting.
Is there a way to calculate the same thing using a 
21-day moving average as the mid-point around which the adjustable bands move, 
rather than using BBands?Rick
 
----- Original Message ----- 
<BLOCKQUOTE 
>
  <DIV 
  >From: 
  Dimitris 
  Tsokakis 
  To: <A title=amibroker@xxxxxxxxxxxxxxx 
  href="">amibroker@xxxxxxxxxxxxxxx 
  Sent: Friday, September 19, 2003 5:54 
  AM
  Subject: [amibroker] Adjustable Bollinger 
  Bands
  
  Paste in Inicator builder the
   
  // Adjustable Bollinger bandsn=20;
  Lookback=100;
  <FONT 
  size=2>perc=95;for(f=1.5;f<3;f=f+0.01){bB=BBandBot(C,n,f);bT=BBandTop(C,n,f);x=100*Sum(C>=bB 
  AND 
  C<=bT,Lookback)/Lookback;if(x[BarCount-1]<=perc){g=f;}}newbB=BBandBot(C,n,g);newbT=BBandTop(C,n,g);newperc=100*Sum(C>=newbB 
  AND 
  C<=newbT,Lookback)/Lookback;Plot(C,"",1,64);Plot(newbB,"",colorLightYellow,8);Plot(newbT,"",colorLightYellow,8);Plot(BBandBot(C,n,2),"",colorRed,1);Plot(BBandTop(C,n,2),"",colorRed,1);Title="f 
  min="+WriteVal(g,1.2)+",perc="+WriteVal(newperc,1.0)+"%";
   
  The formula will find the f min necessary for the 95% 
  confidence, will plot the new BBands and, for comparison, will plot the 
  usual f=2 BBlines.It is interesting to see fminCSCO=2.09 but 
  fminBEAS=2.70.You may adjust n, Lookback and perc.Dimitris 
  TsokakisSend 
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