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Re: [amibroker] Re: Synchronization problem between panes using Static array variables



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On Friday 13 March 2009 15:55:26 Dennis Brown wrote:
> Thomas,
>
> When dealing with multiple panes and static variable of all kinds, you
> have to really understand the internal sequencing of events in AFL
> formulas.  To keep things as simple as possible, I do everything in
> one chart.  However, that does not mean it is not possible to do what
> you want.  

Dennis, it was actually your post some days ago that gave me this idea. This 
was a feature I had been waiting for a long time (although I hadn't sorted it 
under static array variables), and I was very happy when TJ implemented it. 
The next feature I'm hoping for is the possibility to create panes 
programmatically as, e.g., Wealthlab seems to be able according to the coding 
examples in S&C.

> I am guessing that the issue is that the event that causes
> a refresh of the main chart to recalculate the static array variables
> is not sent to the second pane.  It did not get an event to tell it it
> needs to run its AFL formula again, so the display is just sitting
> there with the old information until some event causes it to refresh
> (like clicking on the chart).  One thing you can try is to just apply
> a timed refresh to the second slave pane that is just plotting the
> results.  That way it will follow any changes to the other pane, but
> with very low overhead.

That's exactly what I'm already doing as mentioned in another post although TJ 
doesn't recommend it for EOD.
>
> BR,
> Dennis

Thanks for your comments.
Greetings,

Thomas
>
> On Mar 13, 2009, at 10:05 AM, Thomas Ludwig wrote:
> > Barry,
> >
> > thanks for your hints. Unfortunately, they didn't solve my problem.
> > On the
> > contrary, now even scrolling through dates doesn't cause a re-
> > calculation any
> > more.
> >
> > Greetings,
> >
> > Thomas
> >
> > On Friday 13 March 2009 14:51:30 Barry Scarborough wrote:
> >> I assume when you switch between symbols you want to preserve the
> >> data
> >> relative for each symbol. If so the names must be unique. Have you
> >> tried
> >> using a prefix to differentiate the symbols when you switch them?
> >> Try this
> >> and see if it works when you change tickers.
> >>
> >> StaticVarSet(name() + "varccibuysignals", Buy1);
> >>
> >> If you also switch time frames add the interval,
> >>
> >> VarPfx = name() + numtostr(interval, 1, false);
> >> StaticVarSet(VarPfx + "varccibuysignals", Buy1);
> >>
> >> This will give your static vars a unique name between tickers and
> >> times.
> >>
> >> Barry
> >>
> >> --- In amibroker@xxxxxxxxxxxxxxx, Thomas Ludwig <Thomas.Ludwig@xxx>
> >>
> >> wrote:
> >>> Hello,
> >>>
> >>> I've implemented this new feature in AB in a certain layout. I'm
> >>> using a
> >>> variable CCI in one pane and plot the signals in the other.
> >>>
> >>> So in the one pane I defined:
> >>>
> >>> [...]
> >>> StaticVarSet("varccibuysignals", Buy1);
> >>> StaticVarSet("varccisellsignals", Sell1);
> >>> StaticVarSet("varcci", varcci(Avg,n));
> >>>
> >>> and in the other one:
> >>> [...]
> >>> varccibuysig = StaticVarGet("varccibuysignals");
> >>> varccisellsig = StaticVarGet("varccisellsignals");
> >>> varcci = StaticVarGet("varcci");
> >>> PlotShapes(varcciBuysig*shapeUpTriangle,colorGreen,0,L,-25);
> >>> PlotShapes(varcciSellsig*shapeDownTriangle,colorRed,0,H,-25);
> >>> Varccicolor=IIf(Varcci>0,colorGreen,colorRed);
> >>> Plot(2,"",Varccicolor,styleArea|styleOwnScale,0,100,0);
> >>> Plot( 3,"",colorBlack,styleOwnScale|styleArea|styleNoLabel,0, 100 );
> >>>
> >>> This works very well - with one exception: If I scroll through my
> >>> symbols
> >>> tree to plot other symbols with this layout, the signals in the
> >>> second
> >>> pane are not properly updated/synchronized. Only if I scroll through
> >>> dates in the scroll bar at the bottom, the signals are re-
> >>> calculated. I
> >>> guess it's a caching problem. How can programmatically avoid it? I
> >>> have
> >>> tried using
> >>> RequestTimedRefresh( 1 ); and that works. But since I'm not a real-
> >>> time
> >>> trader (only EOD) I wonder if that makes much sense and if there
> >>> is a
> >>> simpler solution.
> >>>
> >>> I have a probably similar problem (that has nothing to do with
> >>> static
> >>> array variables) in another layout. In one of its sheets I'm
> >>> calculating
> >>> several market indicators (zscores for put/call-ratio, VIX, VXN,
> >>> etc.)
> >>> using the Foreign() function. If I click this sheet for the first
> >>> time
> >>> not all of these indicators are properly displayed. Only after
> >>> scrolling
> >>> through dates or switching to another sheet and switching back
> >>> they are
> >>> displayed as they should.
> >>>
> >>> Any help would be appreciated.
> >>>
> >>> Greetings,
> >>>
> >>> Thomas
> >>
> >> ------------------------------------
> >>
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> ------------------------------------
>
> **** IMPORTANT PLEASE READ ****
> This group is for the discussion between users only.
> This is *NOT* technical support channel.
>
> TO GET TECHNICAL SUPPORT send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> http://www.amibroker.com/feedback/
> (submissions sent via other channels won't be considered)
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> Yahoo! Groups Links
>
>
>


------------------------------------

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This group is for the discussion between users only.
This is *NOT* technical support channel.

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TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
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