Problem by scanning the Linear-Regresion Chanel

• 10/25/2024 at 2:11 PM #239463
  thomas2004ch

  Hi,

  I have an indicator here to measure the linear regression as follow:

  //Parameters :
  Len = 100
  percent = 0.002

  once j=0
  de48=DPO[Len*2](close)
  if de48=de48[1] and de48[1]=de48[2] and de48[2]<>de48[3] then
  flag=1
  endif

  n=(Len*2)-4
  p=(n/2)-1
  d100=DPO[n](close)
  moy100=close-d100
  co=(moy100-moy100[1]+(close[p])/n)*n
  if flag=1 and flag[1]=0 then
  test=linearregression[Len](co)
  test1=linearregressionslope[Len](co)
  a=test1
  b=test-test1*Len
  endif

  if flag=0 then
  reg=undefined
  upperchan=undefined
  lowerchan=undefined
  else
  j=j+1
  reg=a*j+b
  upperchan = reg + reg*percent
  lowerchan = reg – reg*percent
  endif

  RETURN reg COLOURED(0,0,255) as “channel center”, upperchan COLOURED(0,255,0) as “upper channel”, lowerchan COLOURED(255,0,0) as “lower channel”

  It looks like in the the attached picture.

  I create a scnner to scan which stock has the positive LR as follow but it finds nothing:

  //Parameters :
  Len = 100
  percent = 0.002

  once j=0
  de48=DPO[Len*2](close)
  if de48=de48[1] and de48[1]=de48[2] and de48[2]<>de48[3] then
  flag=1
  endif

  n=(Len*2)-4
  p=(n/2)-1
  d100=DPO[n](close)
  moy100=close-d100
  co=(moy100-moy100[1]+(close[p])/n)*n
  if flag=1 and flag[1]=0 then
  test=linearregression[Len](co)
  test1=linearregressionslope[Len](co)
  a=test1
  b=test-test1*Len
  endif

  if flag=0 then
  reg=undefined
  upperchan=undefined
  lowerchan=undefined
  else
  j=j+1
  reg=a*j+b
  upperchan = reg + reg*percent
  lowerchan = reg – reg*percent
  endif

  c1 = reg > 1

  SCREENER[c1]

  What could be the problem?

   

   

   

  

  thomas2004ch

  Participant

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  Been thanked: 1 time
  10/25/2024 at 3:14 PM #239465
  robertogozzi

  REG will always be > 1.

  You  check whether REG is on the rise:

  c1 = reg > reg[1]

  1	c1 = reg > reg[1]

  or falling:

  c1 = reg < reg[1]

  1	c1 = reg < reg[1]

   

   

   

  1 user thanked author for this post.

  Iván

  

  robertogozzi

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  10/25/2024 at 4:24 PM #239472
  thomas2004ch

  Here is my code again. But no stock is scanned out:

  //Parameters :
  Len = 100

  once j=0
  de48=DPO[Len*2](close)
  if de48=de48[1] and de48[1]=de48[2] and de48[2]<>de48[3] then
  flag=1
  endif

  n=(Len*2)-4
  p=(n/2)-1
  d100=DPO[n](close)
  moy100=close-d100
  co=(moy100-moy100[1]+(close[p])/n)*n
  if flag=1 and flag[1]=0 then
  test=linearregression[Len](co)
  test1=linearregressionslope[Len](co)
  a=test1
  b=test-test1*Len
  endif

  if flag=0 then
  reg=undefined
  else
  j=j+1
  reg=a*j+b
  endif

  c1 = reg > reg[1]

  SCREENER[c1]

  Maybe here something wrong?

  

  thomas2004ch

  Participant

  Topics: 29

  Replies: 47

  Been thanked: 1 time
  10/25/2024 at 4:44 PM #239475
  robertogozzi

  The issue is the data history, which is limited to 256 bars (unless you have the Premium version by ProRealTime).

  Both the Regression and DPO use many more periods than those you oplan to use.

  Try using LEN = 20 (or maybe 50, you’ll have to make some attempts till you find the max value supported).

   

  1 user thanked author for this post.

  Iván

  

  robertogozzi

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  10/25/2024 at 5:10 PM #239478
  thomas2004ch

  Many thanks.

  I use Len=10, then there are about 8 stocks be scanned out. Terrible. 🙂

   

  the smaller the Len, the more stocks can be scanned out.

  

  thomas2004ch

  Participant

  Topics: 29

  Replies: 47

  Been thanked: 1 time
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