Hello,
Quite frankly I was saying that many users abuse chart formulas for doing stuff
that should be placed elsewhere.
I was also recommending to use AA/run-every to process offline instead of
putting all code into charts
long time ago, last time it was here:
http://finance.groups.yahoo.com/group/amibroker/message/151513
and here:
http://finance.groups.yahoo.com/group/AmiBroker-at/message/5131
but unfortunately no one seemed to be listening.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-08-04 01:44, Herman wrote:
The code doesn't execute faster in the AA. You are off-loading processing from the indicator to the AA, i.e. let the indicator do the plotting and let the AA
do the calculations once a second. This is fast enough because the only thing that changes on your chart is the last bar and you can keep that "live" by
plotting a single candle indicator.
a very simple example:
AA code, set to Current Symbol, All Quotations, Run-Every to 1 sec, and run
SCAN:
*Buy*=*Sell*=*Short*=*Cover*=0;
StaticVarSet( "BBTop", BBandTop( *C*, 20, 2 ) );
StaticVarSet( "BBBot", BBandBot( *C*, 20, 2 ) );
Indicator code:
Plot( *C*, "", 1, 64 ); *// this plot is live
*Plot( StaticVarGet( "BBTop" ), "BBTop", *colorBlue*, *styleLine* ); *// this
updates 1/sec
*Plot( StaticVarGet( "BBBot" ), "BBBot", *colorBlue*, *styleLine* );
On my computer the Indicator part executes 3x faster plotting speeds up the Indicator code 3x, AA 0.9 mSec, Indicator 0.3 mSec. Of course the gains would be
much greater with complex code.
If anyone sees something wrong with the AA idea please speak up. It seems to be too good to be true, usually there is something wrong when things look too
good ;-)
I am surprised no one critiqued this idea. There must be a negative side to
this... anyone?
Herman
*> Herman,
> Can you explain a little more about the indicator code vs
> AA code... is it identical...? I'm not entirely clear why
> it executes so much faster via the AA than an indicator in a chart.
> Many Thanks
> Rob
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