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RE: [amibroker] Detrending



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<FONT 
color=#000080>Please ignore this unfinished msg that seems to have 
self-dispatched when Outlook crashed. -Bob
<FONT 
color=#000080>------------ <SPAN 
class=732120600-03052003> Jason,
 Athough some swear 
by advanced concepts from a Hurst course that Trading Press 
sells, <FONT 
color=#000080>Curry uses classic Hurst per the $25 book I cited.  

The concept is simple 
and not AFAIK derived from EW--not familiar enuf 
with Miner-projections to comment
<FONT 
color=#000080> 
A1. Pick a centered 
MA [CMA] that best fits the chart for the period of interest--clearly a bit 
arbitrary
A2 Form an 
envelope  from the CMA to contain the prices--in his book, outliers were 
sometimes allowed
You now 
<FONT face=Tahoma 
size=2>
 
 
 
 
 -----Original 
Message-----From: Jayson 
[mailto:jcasavant@xxxxxxxxxxxx]Sent: Friday, May 02, 2003 10:26 
AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] 
Detrending

  <SPAN 
  class=140041117-02052003>Bob,
  <SPAN 
  class=140041117-02052003>Thank you for posting your 
  examples....
  <SPAN 
  class=140041117-02052003> 
  The 
  cycle wave link is also interesting. Have you developed an AFL for the hurst 
  channels? He appears to be drawing from Elliot but the time study leads me to 
  think he may be also looking at Miner style projections. Do you 
  know?
   Jayson 
  <FONT face=Tahoma 
  size=2>-----Original Message-----From: Bob Jagow 
  [mailto:bjagow@xxxxxxxxxxx]Sent: Thursday, May 01, 2003 7:50 
  PMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] 
  Detrending
  <FONT 
  color=#000080>Jason,
  <SPAN 
  class=556303616-01052003>I blew the sign of  
  Disp--forgot  I'd made the DispMa.afl to remind me 
  8>)
  Looks like the refs 
  also have problems with forward and backward <SPAN 
  class=556303616-01052003>;<SPAN 
  class=556303616-01052003>I've commented on 
  them below.  There's addtnl trading hints at<SPAN 
  class=556303616-01052003> 
  <A 
  href=""><FONT 
  color=#000080>http://www.incrediblecharts.com/technical/detrended_price_oscillator.htm<FONT 
  color=#000080> , which also perpetuates Achelis' 
  ambigious            DPO 
  = Close - Simple moving average [from (n / 2 + 1) days ago] 
  
   
  <FONT 
  color=#000080>JM Hurst** introduced the 
  centered MA  in the '60s in "The Profit Magic of Stock Transaction 
  Timing" and his techniques are still popular; see for example, Clyde Lee's 
  SwingTimer [he posts charts on the MedianLine and RealTraders yahoo 
  lists] and Jim Curray's predictions at 
  <A 
  href="">http://cyclewave.homestead.com/MarketTurns.html
  <FONT 
  color=#000080> 
  <FONT 
  color=#000080>I  use his centered MA for cycle 
  analysis and follow Clyde and Jim's work.
  <FONT 
  color=#000080>I've attached two <FONT 
  color=#000080>afls [the 2nd  matches MetaStock's DPO] and a gif 
  to show how to pick pds using the centered MA 
  ..
  <SPAN 
  class=556303616-01052003> 
  I seldom use the DPO 
  per sec .but it should be useful for finding short-tem 
  swings. 
  <FONT 
  color=#000080> 
  <FONT 
  color=#000080>Bob
  <SPAN 
  class=556303616-01052003> <FONT 
  color=#000080>----
  ** Google will catch 
  an additional Hurst,  a hydrologist who's <FONT 
  color=#000000>rescaled-range exponent is big with the fractals 
  crowd.
  
    <FONT face=Tahoma 
    size=2><FONT face=Arial color=#000080 
    size=3> -----Original Message-----From: Jayson 
    [mailto:jcasavant@xxxxxxxxxxxx]Sent: Thursday, May 01, 2003 9:26 
    AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: 
    [amibroker] Detrending
    <SPAN 
    class=992101316-01052003>Bob,
    <SPAN 
    class=992101316-01052003> 
    Thanks for 
    posting. A goggle search produces several more 
    variations.......
    <SPAN 
    class=992101316-01052003> 
    from equis.. 
    <A 
    href="">http://www.paritech.com/education/technical/custom/indicators/detrended.asp<SPAN 
    class=556303616-01052003>[=>]  They had 
    the right Sign for Ref 
    <SPAN 
    class=992101316-01052003> 
    from 
    GannAnalyst   <A 
    href="">http://www.gannalyst.com/Gannalyst_lite/Gannalyst_Indicators_DetrendedPrice.asp<SPAN 
    class=556303616-01052003>[=>]  More 
    ambigous  than  Achelis 
    
    <SPAN 
    class=992101316-01052003> 
    from Equity 
    Analytics  <A 
    href="">http://www.e-analytics.com/dpo.htm     
    This seems to agree with yours<FONT 
    color=#000080 size=3>[=>]  Top-notch-- "Move it back to Center it 
    => [Ref(ma,+pds/2+1)
    <SPAN 
    class=992101316-01052003> 
     Most 
    seem to follow your similar theme but may arrive at the final calculation 
    from a slightly different angle.. 
    <SPAN 
    class=992101316-01052003> 
    Have 
    you  used this indicator in your trading and if so what has been your 
    "take" on its usefulness?
     Jayson 
    <FONT face=Tahoma 
    size=2>-----Original Message-----From: Bob Jagow 
    [mailto:bjagow@xxxxxxxxxxx]Sent: Thursday, May 01, 2003 11:57 
    AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: 
    [amibroker] Detrending
    <FONT color=#000080 
    size=2>Jason,
    I 
    believe the DPO should be
    <FONT 
    size=2> 
    Pds=Param(<FONT 
    color=#ff00ff>"PDS",2<FONT 
    color=#ff00ff>0,1,<FONT 
    color=#ff00ff>200,1);
    dma = Ref(<FONT 
    color=#0000ff>MA(C,pds),-(pds/<FONT 
    color=#ff00ff>2+1));
    dpo=C-dma;
    Plot<FONT 
    size=2>(dma,"DMA",2,styleLeftAxisScale);<FONT 
    color=#0000ff>
    Plot<FONT 
    size=2>(dpo,"DPO",5,4);
    PlotGrid<FONT 
    size=2>(0,colorWhite);
     
    <FONT color=#000080 
    size=2>That is, you are subtracting a Hurst shifted-MA as the Achelis 
    ref badly shows.
    <FONT color=#000080 
    size=2>I added the MA so that the best period can be picked via the Pds 
    param.
    <FONT color=#000080 
    size=2> 
    <FONT color=#000080 
    size=2>Bob
     
    <FONT 
    size=2><FONT 
    color=#000000> 
    
      <FONT face=Tahoma 
      size=2>-----Original Message-----From: Jayson 
      [mailto:jcasavant@xxxxxxxxxxxx]Sent: Thursday, May 01, 2003 
      7:08 AMTo: amibroker@xxxxxxxxxxxxxxxSubject: RE: 
      [amibroker] Detrending
      <SPAN 
      class=025080514-01052003>Chuck,
      <SPAN 
      class=025080514-01052003>I do not how useful you will find this bur here 
      is the detrended Price Oscillator  (DPO)....
      <SPAN 
      class=025080514-01052003> 
      <FONT 
      color=#282828> <FONT 
      color=#0000ff>
      Pds=Param("PDS",10,1,200,1<FONT 
      color=#282828><FONT face="Arial CE" color=#0000ff 
      size=2>);<FONT 
      color=#0000ff>
      dpo=C<FONT 
      face="Arial CE">-(MA(C,(pds/2)+1<FONT 
      color=#282828>));<FONT 
      color=#0000ff>
      Plot(dpo,<FONT 
      color=#ff00ff>"DPO",<FONT 
      color=#ff00ff>4,<FONT 
      color=#ff00ff>1);<FONT 
      color=#0000ff>
      PlotGrid(<FONT 
      color=#ff00ff>0,<FONT 
      color=#000000>colorWhite<FONT face="Arial CE" 
      color=#282828 size=2>);
       
      <SPAN 
      class=025080514-01052003>here is the reference from TA 
      A-Z    <A 
      href="">http://www.equis.com/Education/TAAZ/?page=48
       
       Jayson 
      <FONT face=Tahoma 
      size=2>-----Original Message-----From: Chuck Rademacher 
      [mailto:chuck_rademacher@xxxxxxxxxx]Sent: Thursday, May 01, 
      2003 5:17 AMTo: amibroker@xxxxxxxxxxxxxxxSubject: 
      [amibroker] Detrending
      <FONT face=Arial color=#0000ff 
      size=2>Has anyone written any AFL code for "detrending" that they are 
      willing to share?
      <FONT face=Arial color=#0000ff 
      size=2> 
      <FONT face=Arial color=#0000ff 
      size=2>If not, is anyone interested in the code if I have to write 
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