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Graham:
Since attachments cannot be posted, I sent you Metastock and AB charts with the same brick (box) size (144) for DJI. Did you get them? These charts allow you to compare and see the difference. Forget about dates and just count up and down boxes. Either Metastock's chart is right or it is not. Perhaps someone else who is using Renko could confirm or deny that the code is producing the correct results.
Bill
----- Original Message -----
From: Graham
To: amibroker@xxxxxxxxxxxxxxx
Sent: Friday, August 13, 2004 2:41 AM
Subject: RE: [amibroker] Renko chart code revC
Bill you will find the same with what I have produced. Bricks DO NOT
correspond to actual dates on the normal price chart, and if you look at the
3rd line of my chart it says it there. " // Custom Indicator, date axis
does not apply "
I think I have a better representation of it now in revD below. I will say
again I have no actual renko chart to compare what I am doing with. Examples
are fine and I followed the logic of it from sites like the equis, but it is
hard not to be able to compare as I go. Plus I have never used the renko
chart, so I have no "feel" for how it is supposed to look.
You will need to decide how you size the bricks yourselves.
Here is revD
Cheers,
Graham
http://e-wire.net.au/~eb_kavan/
// Renko Chart
// Graham Kavanagh 13 Aug 2004 ver D
// Custom Indicator, date axis does not apply
SetBarsRequired(10000,10000);
// Brick size is dependant on what you want, if too small will not produce a
chart due to insufficient x-axis bars
//Brick = LastValue( ATR(100) );
Brick = LastValue( Max(0.02*C, 0.02) );
reverse = 2;
// Convert the closing price to rising and falling rounded bricks
CF = ceil(C/Brick);
CR = floor(C/Brick);
// initialize first element
j = 0;
RKC[j] = CF[0];
RKO[j] = CF[0] + 1;
down[j] = 1; // By default the first bar is a down bar.
up[j] = 0;
// Loop to produce the Renko values in number of bricks
for( i=1; i<BarCount-1; i++ )
{
if( CF[i] <= RKC[j] - 1 && down[j] ) // Continue down
{
num = RKC[j] - CF[i];
for( x=1; x<=num; x++ )
{
j++;
up[j] = 0;
down[j] = 1;
RKC[j] = RKC[j-1] - 1;
RKO[j] = RKC[j] + 1;
}
}
else
{
if( CR[i] >= RKC[j] + Reverse && down[j] ) // Change down
to up
{
num = CR[i] - RKC[j];
j++;
up[j] = 1;
down[j] = 0;
RKC[j] = RKC[j-1] + 2;
RKO[j] = RKC[j] - 1;
for( x=2; x<=num; x++ )
{
j++;
up[j] = 1;
down[j] = 0;
RKC[j] = RKC[j-1] + 1;
RKO[j] = RKC[j] - 1;
}
}
else
{
if( CR[i] >= RKC[j] + 1 && up[j] ) // Continue Up
{
num = CR[i] - RKC[j];
for( x=1; x<=num; x++ )
{
j++;
Up[j] = 1;
Down[j] = 0;
RKC[j] = RKC[j-1] + 1;
RKO[j] = RKC[j] - 1;
}
}
else
{
if( CF[i] <= RKC[j] - Reverse && up[j] ) //
Change up to down
{
num = RKC[j] - CF[i];
j++;
Up[j] = 0;
Down[j] = 1;
RKC[j] = RKC[j-1] - 2;
RKO[j] = RKC[j] + 1;
for( x=2; x<=num; x++ )
{
j++;
up[j] = 0;
down[j] = 1;
RKC[j] = RKC[j-1] - 1;
RKO[j] = RKC[j] + 1;
}
}
}
}
}
}
// move the chart to right end of chart space, ie last brick on last bar
position
delta = BarCount-1 - j;
RKC = Ref( RKC, -delta );
RKO = Ref( RKO, -delta );
Up = Ref( Up, -delta );
Down = Ref( Down, -delta );
rC = RKC * Brick;
rO = RC - (Up-down)*Brick;
rH = Max(rC,rO);
rL = Min(rC,rO);
// plot chart
PlotOHLC( rO, rH, rL, rC, "Brick size = " + brick + "Renko Price =" ,
colorBlack, styleCandle);
GraphXSpace=5;
Title = "{{NAME}} - {{INTERVAL}} {{DATE}} - Renko Chart : Last Value = " +
RC + ", Brick Size = " + Brick;
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