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Graham:
There is a significant difference in appearance between your version and Metastock's. Note that their "brick" spans a variable time frame, rather than daily. Look at the dates on the two charts. This difference reflects the logic used in drawing the bricks (http://www.equis.com/Education/TAAZ/?page=101).
Bill
----- Original Message -----
From: Graham
To: amibroker@xxxxxxxxxxxxxxx
Sent: Friday, August 13, 2004 12:23 AM
Subject: RE: [amibroker] Renko chart code revC
Sorry for sending revisions before anyone has a chance to respond.
I have amended it in the loops and hopefully this may be better.
I have made the bricks similar in position as the boxes in P&F charts. They
straddle the price so that the brick mid point is the actual price of the
brick close.
The title is also added and this gives the actual brick closing price.
One thing you will need to do is make the brick size suit your stocks. I
leave that to you :)
If no corrections are necessary to the logic or construction I will post
this to the library over the weekend.
Cheers,
Graham
http://e-wire.net.au/~eb_kavan/
// Renko Chart
// Graham Kavanagh 13 Aug 2004 ver C
// 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 = 1;
// 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] + 1;
RKO[j] = RKC[j] - 1;
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( 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] - 1;
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 + (Up-down)*Brick/2;
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 = " +
RKC * Brick + ", Brick Size = " + Brick;
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