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Point & Figure chart for Amibroker (AFL)
vishyvishy
about 15 years ago
Amibroker (AFL)

Rating:
5 / 5 (Votes 1)
Tags:
amibroker

A great point and figure chart for Amibroker!

Author: Graham Kavanagh

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//  Supersedes other P&F versions in this and yahoo files.
//
//  P&F chart for V4.40 and above. Based on close prices.
//
//  Problem resolved with boxes not being created at right prices due to the 9
//  decimal place inaccuracies for numbers with decimals. This was causing a
//  problem creating the rising and falling boxes with the Ceil and Floor
//  functions.
//
//  Place in indicator builder. Chart is compacted to the right end of the
//  chart space ending on last date bar.
//
//  Box sizes and reverse can be changed near the beginning of the afl code
//  within the "Boxsize = IIF" statements.
//
//------------------------------------------------------------------------------
 
//AFL P&F Chart for Amibroker Indicator window. Based on High/low prices.
//Based on code in AB help files
//Reverse is 3 boxes.
//Graham Kavanagh 30 Sep 2003
 
Version(4.40);
SetBarsRequired(100000,100000);
 
//Size for P&F boxes
boxsize=IIf(C<0.05, 0.001,
IIf(C>=0.05 AND C<0.1, 0.002,
IIf(C>=0.1 AND C<0.5, 0.005,
IIf(C>=0.5 AND C<2, 0.01,
IIf(C>=2 AND C<5, 0.02,
IIf(C>=5 AND C<10, 0.05,
IIf(C>=10 AND C<50, 0.1,
IIf(C>=50 AND C<100, 0.2,
IIf(C>=100 AND C<200, 0.5,
IIf(C>=200 AND C<500, 1,
2 ))))))))));
Box = LastValue(boxsize);
HX = round((H/box)*10)/10;
LX = round((L/box)*10)/10;
RH = floor(HX);
FL = ceil(LX);
 
 
// initialize first element
j = 0;
 
Reverse = 3;                      // reversal requirement
 
PFC[j] = FL[0];
PFO[j] = PFC[j] + 1;
down = 1;                  // By default the first bar is a down bar.
up = 0;
swap = 0;
 
// perform the loop that produces PF Chart
for( i = 1; i < BarCount; i++ )
{
 
 if( FL[i] <= PFC[j]-1 && down)         //continue down
 {
  PFC[j] = FL[i];
  PFO[j] = PFC[j] + 1;
 }
 else
 {
  if( RH[i] >= PFC[j] + Reverse && down)  //Change direction to up
  {
   j++;
   swap = 1;
   PFC[j] = RH[i];
   PFO[j] = PFC[j]-1;
  }
 }
 if( RH[i] >= PFC[j] + 1 && up)         //Continue up
 {
  PFC[j] = RH[i];
  PFO[j] = PFC[j] - 1;
 }
 else
 {
  if( FL[i] <= PFC[j] - Reverse && up)   //Change direction to down
  {
   j++;
   PFC[j] = FL[i];
   PFO[j] = PFC[j] + 1;
   swap = 1;
  }
 }
 if( swap )
 {
  swap = 0;
  if( up )
  {
   up = 0;
   down = 1;
  }
  else
  {
   up = 1;
   down = 0;
  }
 }
}
delta = BarCount - j-1;
 
 
PFO = Ref( PFO, -delta );
PFC = Ref( PFC, -delta );
 
// High-Low range sets the height of the P&F bar
H = IIf(Ref(PFC,-1)>Ref(PFO,-1),Ref(HHV(PFC,1),-1)-1,Max(PFO,PFC))*Box;
L = IIf(Ref(PFC,-1)<Ref(PFO,-1),Ref(LLV(PFC,1),-1)+1,Min(PFO,PFC))*Box;
O = IIf(Ref(PFC,-1)>Ref(PFO,-1),Ref(HHV(PFC,1),-1)-1,IIf(Ref(PFC,-1)<Ref(PFO,-1),Ref(LLV(PFC,1),-1)+1,PFO))*Box;
 
// the difference between Open AND Close should be set to box size
// the sign decides if X or O are plotted
C = O + Box * IIf( PFC > PFO, 1,-1);
 
GraphXSpace = 2;
Title ="No Jscript  " + Name()+ "  PF HiLo, H: " + H+ ", L: " + L+", Box: "+ box + ", Reversal: " + reverse;
 
Plot( C, "P&F Chart Close", IIf( PFC > PFO, colorBlue, colorRed ), styleCandle+styleNoLabel+stylePointAndFigure);

4 comments

1. cadoize
about 8 years ago

too many errors (8)

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2. Carlin
about 8 years ago

Looks like keyword Reverse has been used as a variable. Replace it with Reverse_ and the P&F charts will work.

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3. sbrahmam
about 6 years ago

Thanks Carlin. It worked like charm

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4. amilane748
over 5 years ago

I have some problem in customize this code to 1 point reverse and get to this (missing column when price move up/move down 1 point). Can you help me to re-arrange this 1 point reverse chart? Please.
Thank you for the amazing code
1PointPnf

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