[amibroker] Re: how to improve loop speed

["Panos Boufardeas" <panosbouf@xxxxxxxxxxx>]

Thank you Tomasz
 
So what I can see from your reply, this example here is correct.
But must be a way for a loop to calculate only the last X bars, and 
not all of theme
 
Thank you 
Panos

--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> 
wrote:
>
> Hello,
> 
> Move ALL array functions OUTSIDE of loop!
> 
> Inside the loop there should be only NON-array functions.
> 
> 
> // THIS MUST BE OUTSIDE THE LOOP !!!!!!
> 
> Q=Param( "% Change",1.50,.25,14 ,0.25);
> 
> Z= Zig(C,q ) ;
> 
> HH=((Z<Ref(Z,- 1) AND Ref(Z,-1) > Ref(Z,-2)) AND (Peak(z,q,1 )
> 
>  >Peak(Z,q,2 )));
> 
> LL=((Z>Ref(Z,- 1) AND Ref(Z,-1) < Ref(Z,-2)) AND (Trough(Z,q,1 ) 
<Trough(Z,q,2 )));
> 
> 
> dist = 0.5*ATR (20);
> 
> 
> for( i = 0; i < BarCount; i++ )
> {
> 
>   // ONLY THIS should be inside the loop
>   if( HH [i]) PlotText( "HH"+ "\n"+H[ i ], i, H[ i ]+dist[i], 
colorGreen );
>   if( LL [i] ) PlotText( ""+L[ i ]+"\nLL", i, L[ i ]-dist[i], 
colorRed );
> }
> 
> Nothing more is needed.
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message ----- 
> From: "Panos Boufardeas" <panosbouf@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, November 27, 2008 6:45 PM
> Subject: [amibroker] how to improve loop speed
> 
> 
> 
> 
> Hi
> 
> I am curious to find out how to make a loop to run from 
firstvisiblebar
> 
> 
> I think I need to write something like the following . but I don't 
know how
> 
> 
> lvb = Status("lastvisiblebar");
> 
> fvb = Status("firstvisiblebar");
> 
> 
> for( i = 0; i < ??? ; i++ )
> 
> {
> 
> 
> I have an example here that executes very slowly in live intra day 
chart
> 
> Can you tell me please how I can correct this example ?
> 
> 
> Q=Param( "% Change",1.50,.25,14 ,0.25);
> 
> Z= Zig(C,q ) ;
> 
> HH=((Z<Ref(Z,- 1) AND Ref(Z,-1) >
> 
>   Ref(Z,-2)) AND (Peak(z,q,1 )
> 
>  >Peak(Z,q,2 )));
> 
> LL=((Z>Ref(Z,- 1) AND Ref(Z,-1) < Ref(Z,-2)) AND (Trough(Z,q,1 )
> 
> <Trough(Z,q,2 )));
> 
> 
> dist = 0.5*ATR (20);
> 
> 
> for( i = 0; i < BarCount; i++ )
> 
> {
> 
> if( HH [i]) PlotText( "HH"+ "\n"+H[ i ], i, H[ i
> 
> ]+dist[i], colorGreen );
> 
> if( LL [i] ) PlotText( ""+L[ i ]+"\nLL", i, L[ i
> 
> ]-dist[i], colorRed );
> 
> }
> 
> 
> Plot(C,"",IIf(C>O,colorGreen,colorRed),styleCandle);
> 
> 
> Thank you
> 
> Panos
> 
> 
> 
> 
> 



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