Re: [amibroker] Problem using IIf() and arrays to track peaks and valleys

["Ara Kaloustian" <ara1@xxxxxxxxxx>]

I thinkg the lines below are the problem. isrising and is falling are being
used in defining themselves ... creating a circular reference.

Maybe if you used Ref(isrising,-1) instead of rising ....

isrising = IIf(C>Ref(C,-1) OR C==Ref(C,-1) AND isrising, True, False);
isfalling = IIf(C<Ref(C,-1) OR C==Ref(C,-1) AND isfalling, True, False);

----- Original Message ----- 
From: "keithmccombs" <kmccombs@xxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Saturday, September 18, 2004 9:20 PM
Subject: [amibroker] Problem using IIf() and arrays to track peaks and
valleys


> I am having problems with some code that should find recent peaks and
> valleys and track them.  For example after a price changes from
> rising to falling, the last price would be a peak and the
> array 'recentpeak' should be set to that value and follow it until
> the next peak occurs.  Please see code below.  TIA. -- Keith
> ============
>
> // is price rising or falling (or neither)
> isrising[0] = isfalling[0] = False;  // initialize
> isrising = IIf(C>Ref(C,-1) OR C==Ref(C,-1) AND isrising, True, False);
> isfalling = IIf(C<Ref(C,-1) OR C==Ref(C,-1) AND isfalling, True,
> False);
>
>
> recentpeak[0] = 1000;  // initialize
> recentvalley[0] = 0;   // initialize
> // if it just changed to falling then last value was a peak
> // set value of the peak and follow it until next peak
> recentpeak = IIf(isfalling AND NOT Ref(isfalling,-1), Ref(C,-1), Ref
> (recentpeak,-1));
> //PROBLEM: recentpeak is set to proper value but then goes to zero on
> next bar!!!!
> //  I can't see how it can possible be set to zero.
>
> // similar logic for a valley
> recentvalley = IIf(isrising AND NOT Ref(isrising,-1), Ref(C,-1), Ref
> (recentvalley,-1));
>
> Buy = Cover = Cross(C, recentpeak);
> Sell = Short = Cross(recentvalley, C);
> GraphXSpace=5;
> Plot(C, "Close", colorBlack, styleLine);
> Plot(recentpeak, "Recent Peak", colorGreen, styleLine);
> Plot(recentvalley, "Recent Valley", colorRed, styleLine);
>
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at:
http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> Yahoo! Groups Links
>
>
>
>
>




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