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Hello,
BarCount is just the complete number of bars of a symbol. Therefore there is
only one value of BarCount. If your history includes 100 entries, then
BarCount is 99 and so your loop has to stop before 100 is reached, because
arrays are zero based.
Thomas
www.PatternExplorer.com
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of donpickdonpick
Sent: Wednesday, June 17, 2009 9:17 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Trying to understand BarCount
Below is some code which finds buy and sell points based on ATR. I am still
learning afl code.
My question is regarding the construct:
for( i = 4; i < BarCount; i++ )
What is the value of BarCount? Is this examining the 4 most recent
barcounts?
How many barcounts are being processed? All of them available for a symbol?
Thank you for your help.
for( i = 4; i < BarCount; i++ )
{
if( L[ i ] >= L[ i-2 ] AND
L[ i-1 ] >= L[ i-2 ] AND
L[ i-3 ] >= L[ i-2 ] AND
L[ i-4 ] >= L[ i-2 ] )
{
support[ i ] = L[ i - 2];
}
else
if( L[ i ] > H[ i-1 ] * 1.0013 )
{
support[ i ] = H[ i-1 ] * 0.9945;
}
else
if( L[ i ] > support[ i-1 ] * 1.1 )
{
support[ i ] = support[ i-1 ] * 1.05;
}
else
{
support[ i ] = support[ i-1 ];
}
if( H[ i ] > trends[ i-1 ] AND
H[ i-1 ] > trends[ i-1 ] )
{
trends[ i ] = Max( trends[ i-1 ], support[ i ] );
}
else
if( H[ i ] < trends[ i-1 ] AND
H[ i-1 ] < trends[ i-1 ] )
{
trends[ i ] = Min( trends[ i-1 ], resistance[ i ] );
}
else
if( H[ i ] >= trends[ i-1 ] )
trends[ i ] = support[ i ];
else
trends[ i ] = resistance[ i ];
}
Plot( trends, "Trends", colorRed );
Plot ( C, "Price", colorBlack, styleCandle );
//Plot( C, "Price", colorBlack, styleBar ); - Original
Buy = Cross( C, trends );
Sell = Cross( trends, H );
------------------------------------
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