Re: [amibroker] Previous Value

[Steve Wiser <slwiserr@xxxx>]

This has been done using VBScript a couple of times once as an example and 
another as a tool for an indicator.
See the attached file as an example.

Steve




At 03:29 PM 6/19/01 -0400, you wrote:
Hello to All!

Just got the lastest issure of Active Trader Magazine....always like to 
play around with the systems they present in "The Trading Systems Lab" 
section...

This month they present a system based on a Volume Weighted Moving 
Average. Everything is fairly simple to code into AFL, with one little 
exception...to start the calculation of the VWMA you must have the 
"previous" VWMA to preform the calculation. There is my problem...how to 
get a "previous" value of an array when you haven't preformed the first 
calculation of the array.

All you "Codies" out there...any suggestions?

Thanks

Jeff
EnableScript("vbscript");
<%
close = AFL( "close" ) 
factor = 0.09
var1=close
SetValue Close

Function SetValue(Close)
for i = 1 to UBound( close )
var1( i )= factor * close( i ) + (1 - factor) * var1( i - 1 )
next 
end function

AFL.Var("graph0") = close
AFL.Var("graph1") = var1
%>
WriteVal( graph1 );

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