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

["keithmccombs" <kmccombs@xxxxxxxxxxxx>]

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);




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