I have used the AFL code below with good success. Don't know if it will
satisfy you, but give it a try.
Donald F Lindberg
------------------------- Begin Code ---------------------------------------
_SECTION_BEGIN( "Point & Figure w Values adj" );
GraphXSpace = 5;
SetChartBkColor( ParamColor( "BackGroundColor", colorBlack) );
//GraphColor = ParamColor("GarphColor",colorLightGrey);
GridColor = ParamColor( "GridColor", colorLightGrey );
Scaling = ParamList( "Scaling Method", "Traditional|Percentage|AVG True
Range" );
if ( scaling == "Traditional" )
Box = Param( "Box", 1, 0.2, 10, 0.1 );
else
if ( scaling == "Percentage" )
Box = Param( "Box ", 1, 0.2, 10, 0.1 ) / 100 * LastValue( C );
else
if ( scaling == "AVG True Range" )
Box = Param( "Box", 1, 0.3, 5, 0.1 ) * LastValue( ATR ( 20 ) );
shiftChart = 0;
shiftLastClose = 1;
shiftGrid = 7;
shiftPriceAxis = 2;
Reverse = Param( "Reverse", 3, 1, 5 );
j = 0;
PFL[0] = Box * ceil( Low[0] / Box ) + Box;
PFH[0] = Box * floor( High[0] / Box );
direction = 0;
for ( i = 1; i < BarCount; i++ )
{
if ( direction[j] == 0 )
{
if ( Low[i] <= PFL[j] - Box )
{
PFL[j] = Box * ceil( Low[i] / Box );
}
else
{
if ( High[i] >= PFL[j] + Reverse*Box )
{
j++;
direction[j] = 1;
PFH[j] = Box * floor( High[i] / Box );
PFL[j] = PFL[j - 1] + Box;
}
}
}
else
{
if ( High[i] >= PFH[j] + Box )
{
PFH[j] = Box * floor( High[i] / Box );
}
else
{
if ( Low[i] <= PFH[j] - Reverse * Box )
{
j++;
direction[j] = 0;
PFH[j] = PFH[j - 1] - Box;
PFL[j] = Box * ceil( Low[i] / Box );
}
}
}
}
delta = BarCount - j - 1;
direction = Ref( direction, - delta );
Hi = Ref( PFH, -delta ) + Box / 2;
Lo = Ref( PFL, -delta ) - Box / 2;
Cl = IIf( direction == 1, Hi, Lo );
Op = IIf( direction == 1, Cl - Box, Cl + Box );
Graphcolor = IIf( direction == 1, ParamColor( "X_Color", colorBrightGreen ),
ParamColor( "O_Color", colorRed ) );
PlotOHLC( Op, Hi, Lo, Cl, "", GraphColor ,
stylePointAndFigure | styleNoLabel, 0, 0 , shiftChart );
PlotOHLC( Op, Hi, Lo, Cl, "", GraphColor , stylePointAndFigure |
styleNoLabel, 0, 0 , shiftChart );
Last = Ref( LastValue( C ), -( BarCount - 1 ) );
Plot( Last, "", colorRed, styleNoLine | styleDots, 0 , 0, shiftLastClose );
// selected value
Value = IIf( direction > 0, SelectedValue( Hi ) - box / 2, SelectedValue( Lo
) + box / 2 );
//-----------------------------------------------------------------------
// GRID CONSTRUCTION
//----------------------------------------------------------------------
PlotGridLines = ParamToggle( "PlotdGrid", "Yes! |No", 1 ) ;
if ( PlotGridLines )
{
begin = SelectedValue( BarIndex() );
end = LastValue( BarIndex() );
period = end - begin + 1;
if ( begin < end )
{
ScreenHigh = LastValue( HHV( cl, period ) );
ScreenLow = LastValue( LLV( Cl, period ) );
top = LineArray( begin - shiftGrid, screenHigh, end, screenhigh, 0 , 1 );
Bot = LineArray( begin - shiftGrid, screenlow, end, screenLow, 0, 1 );
Plot( top, "", gridColor, styleLine | styleNoLabel , 0, 0, shiftGrid );
//Plot( bot, "", gridColor,styleLine|styleNoLabel, 0 , 0 , shiftGrid);
VerticalGrid = IIf ( BarIndex() >= begin, IIf( direction == 1, screenHigh,
screenLow ), Null );
Plot ( VerticalGrid, "", gridColor, styleStaircase | styleNoLabel, 0, 0, 1
);
format = 8.2;
for ( n = LastValue( bot ); n < LastValue( top ) - 0.5*box; n = n + box )
{
Plot( bot , "", gridColor, styleLine | styleNoLabel, 0, 0 , shiftGrid );
text = NumToStr( LastValue( bot ) + 0.5 * box, format );
xposition = BarCount + shiftPriceaxis;
yPosition = LastValue( bot ) + 0.27 * box;
PlotText( text, xPosition , yPosition, colorBlue );
bot = bot + box;
Graphcolor = IIf( direction == 1, ParamColor( "X_Color", colorBrightGreen ),
ParamColor( "O_Color", colorRed ) );
PlotOHLC( Op, Hi, Lo, Cl, "", GraphColor ,
stylePointAndFigure | styleNoLabel, 0, 0 , shiftChart );
}
}
}
//---------------------------------------------------------------------
// TITLE
//----------------------------------------------------------------------
Title = "\n" +
" Instrument : " + Name() + FullName() + "\n " +
"Formula : " + " Point & Figure (High/Low Range)" + "\n " +
"Box : " + NumToStr( Box, 4.4 ) + " " +
"Reverse : " + NumToStr( Reverse, 2.0 ) + "\n " +
"ATR : " + WriteVal( LastValue( ATR( 100 ) ), format = 4.4 );
_SECTION_END();
------------------------ End Code -------------------------
_____
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf
Of rr_bt
Sent: Sunday, May 04, 2008 1:10 AM
To: [email protected]
Subject: [amibroker] great p&f chart
hello,
i'm new to amibroker. checked out the p&f charts from the afl library.
copied them into ab but i found the charts difficult to read.
i'm looking for a chart like this one
http://stockcharts. <http://stockcharts.com/def/servlet/SC.pnf?c=ibm,P>
com/def/servlet/SC.pnf?c=ibm,P which has some timing
references (year on the bottom axis and month reflected in the chart
symbols).
just wondering if it would be possible to code the stockcharts.com
chart in amibroker afl? how difficult?
i trialed bull's eye broker product but couldn't get it to work with ab
data (supposed to read ab data directly).
my preference is to have the p&f code in ab so its nicely integrated.
thanks.
