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#! perl -slw
use strict;
...
close IMG;

system 'graph.png';

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c:\test>794374 -STOCKS=5 -CHANGE=20 -TREND=-2
c:\test>794374 -STOCKS=5 -CHANGE=20 -TREND=1
...
c:\test>794374 -STOCKS=5 -CHANGE=10 -TREND=1
c:\test>794374 -STOCKS=5 -CHANGE=10 -TREND=2
c:\test>794374 -STOCKS=5 -CHANGE=10 -TREND=0