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herman sorry for this typo >> should be i>1
for(i=BarCount-1;i>1 AND Status("firstvisiblebar");i--)
At 04:01 AM 29-11-2008 29-11-2008, you wrote:
>The second loop is limited by what you have displayed, not what is in the
>database.
>
>
>also, not sure here, but i think that >> is not a legal operator in AFL
>
>
>Try outputting i to your logging window to confirm what is happening:
>
>
>_trace("i= "+i);
>
>
>herman
>
>
>
>Friday, November 28, 2008, 7:35:23 PM, you wrote:
>
>
> > Hi
>
> > Today I was playing without fully understanding what I was doing and
>
> > I believe I made a break through.
>
> > Any way what I found is if I use
>
> > for(i = 0; i < BarCount; i++ )
>
> > the results are 3446 data bars used during this check. Total
>
> > execution time was 0.0228476 sec.
>
>
> > and If I use
>
>for(i=BarCount-1;i>>1 AND Status("firstvisiblebar");i--)
>
> > The results are 3446 data bars used during this check. Total
>
> > execution time: 0.00249557 sec.
>
>
> > so the second loop looks faster.
>
> > I would like to ask one more time what can I write to use just the
>
> > visible bars? Is this possible? I am trying to find a way to speed up
>
> > the loops in codes that require them ,and to count just the visible
>
> > bars or as less as possible.
>
>
> > Thank you
>
> > Panos
>
>
> > --- In <mailto:amibroker@xxxxxxxxxxxxxxx>amibroker@xxxxxxxxxxxxxxx,
> "Panos Boufardeas" <panosbouf@xxx>
>
> > wrote:
>
>
> >> 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 <mailto:amibroker@xxxxxxxxxxxxxxx>amibroker@xxxxxxxxxxxxxxx,
> "Tomasz Janeczko" <groups@>
>
> >> 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@>
>
> >> > To: <<mailto:amibroker@xxxxxxxxxxxxxxx>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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