[amibroker] Finding previous higher peak value

["Martin Henricson" <martin@xxxxxxxxxxxxx>]

Hi,

I am trying to find out the value of a previous peak. For simplicity I have 
started out with the zig-zag based PeakBars() function. I construct an array 
with booleans indicating if a bar is a peak or not and another array 
indicating the corresponding peak value:

percentChange = 1;
isPeak = PeakBars(H, percentChange) == 0;
peakValue = ValueWhen(isPeak == 1, H);

So far everything is fine. My problem is now that I would like to know the 
value of and number of bars since a previous peak. This previous peak should 
be the first one backwards in time with a higher High than the current peak. 
I would use this information to plot trend lines.

I have made attempts at solving this with looping, but it seems like quite 
time consuming to scan backwards and forth through the arrays to construct 
the needed arrays. So my question is: is there a way to do this with some 
handy array based functions?

Any hints would be highly appreciated!

/Martin



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