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This is NOT complete and tested code but it may give you a looping idea to
start with. This code sums the Close prices for consequtive years and
divides the by the number of times the Close was summed. This doesn't do any
normalization, year synchronization, etc. The result displays at the start
of you X-axis; zoom in to the left-begin of your chart. As an Indicator you
may have to turn Off QuickAFL for this to work - or you can run it from your
AA.
Herman
BI = BarIndex();
SumArray = 0;
NewYear = Year() != Ref(Year(),-1);
OffSet = 0;
Count = 0;
Array = C;
for(b=0; b<BarCount;b++)
{
if( NewYear[b] ) OffSet = BI[b];
SumArray[b-OffSet] = SumArray[b-OffSet] + Array[b];
Count[b-OffSet]++;
}
Average = SumArray/Count;
Plot(Average,"Average",1,1);
-----Original Message-----
From: yps_trader [mailto:yps_trader@xxxxxxxxx]
Sent: Monday, October 04, 2004 1:14 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] ValueWhen() function
Hello,
my aim is to create an array with the closing price on the same day
of the year but one year ago.
I figured I could use the ValueWhen function for this:
x=valuewhen(Dayofyear()==???,C,1);
However I am having problems with the expression. The expression
should be true on every dayofyear() in the past with the same value
as the actual dayofyear().
The larger background is that I would like to create Seasonal Charts
with Amibroker.
I wanted to do this, by averaging the Closing price of each specific
dayofyear() of e.g. the last 10 years and then chart this array.
I hope someone can help me.
Regards
dj
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