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Dale -
I'll take this one since I was here again and checking in anyway.
BTW, thanks Tomasz.
Terry - I believe that AB processes all data in the reference ticker
range for corresponding tick data in the "Apply to" target. This has
significant implications on the processing time.
Here's a short program to prove it to yourself -
// Run this on N last days == 1, or on any From/To period - IT MAKES
NO DIFFERENCE
_TRACE("#DBGVIEWCLEAR");
_TRACE("TICK LOOP");
for ( i = 0; i < BarCount - 1; i++ )
{
if ( i % 252 == 0 )
{
d = DateTime();
_TRACE( NumToStr( d[i], formatDateTime ) );
}
// Do some wasted processing on the tick to show elapsed time
for ( j = 0; j < 1000; j++ )
temp = 0;
}
_TRACE("ARRAY PROCESS");
// Do some wasted processing on the array to show elapsed time
for ( k = 1; k < 100000; k ++ )
temp = EMA( Close, 20 );
Filter = Status( "lastbarinrange" );
AddColumn( C, "Last Close", 8.3 );
_TRACE("STOP");
--- In amibroker@xxxxxxxxxxxxxxx, "dingo" <dingo@xxxx> wrote:
>
> TJ didn't miss it.
>
> d
>
>
> _____
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf
> Of Terry
> Sent: Friday, October 21, 2005 5:21 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Tomasz - Quick AFL
>
>
>
> I was responding to the middle paragraph about QuickAFL in AA. My
statement
> stands as I believe it already works the suggested way. I did not
try the
> artificial reference ticker. Possibly I am missing the point.
>
>
>
> --
>
> Terry
>
> -----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf
> Of dingo
> Sent: Friday, October 21, 2005 14:03
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Tomasz - Quick AFL
>
>
>
> So you didn't try what was suggested and you concluded that it
doesn't make
> sense?
>
>
>
> d
>
>
>
>
> _____
>
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf
> Of Terry
> Sent: Friday, October 21, 2005 3:59 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Tomasz - Quick AFL
>
> This does not make sense to me. You pick the dates you want tested.
There is
> no other way.
>
>
>
> This assumes that if you have data back to say, 1990, and you test
from 2000
> to present, AA only runs from 2000 to present (plus some number of days
> earlier to insure reasonably correct results as required). I'm sure
this is
> correct since I can see the speed change when I test on less data. Try
> testing one month, then test 20 years. It's obvious this is true.
>
> --
>
> Terry
>
> -----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf
> Of dingo
> Sent: Friday, October 21, 2005 12:48
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Tomasz - Quick AFL
>
>
>
> I second that request!!
>
>
>
> d
>
>
>
>
> _____
>
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf
> Of bruce1r
> Sent: Friday, October 21, 2005 12:21 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Tomasz - Quick AFL
>
> First, thanks again for adding the OLE charting properties and methods
> to 4.73. They work out great.
>
> Your previous response about Quick AFL in charting prompts me to ask
> if you have considered employing it in AA methods. Those who
> backtest, scan, etc. would realize speed increases if the From/To
> dates were utilized with a pad similar to what you described in
> QuickAFL in charting. AB is faster than anything else out there, but
> alas, we always want more speed. Have you ever considered this, or
> perhaps it has issues - maybe in the RT area ?
>
> FYI at present, I utilize an artificial reference ticker that is
> written out based on the From date minus 1 year through the end date
> and then imported. It was the best approach that I could come up
> with, and it speeds up a number of AA applications.
>
> -- Bruce R.
>
>
>
>
>
>
>
>
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