Hi Joseph,
 
Try the following lines and plot statement in a new 
formula editor:
 
Barcolor = IIF(C>Ref(C,-1) , colorGreen, colorRed 
);
Plot(C, "Close ", Barcolor , styleBar |styleThick ) 
;
 
This colors the bars based on the relation of the close 
to the prior close.  If you want the bars to depict the relation from 
open to close or to show volume changes, you can edit the Barcolor statement. 
You might also want to add a Title statement and some other things (like setting 
the chart options).
 
Peace and Justice   ---   Patrick
  ----- Original Message ----- 
  
  
  Sent: Tuesday, January 26, 2010 7:26 
  PM
  Subject: [amibroker] Bar Chart 
  Colors
  
  
  Hi All --
  
  How do I make the up days of a bar chart green and down days red?
  
  Thanks 
   
  
  See what's on at the movies in your area. Find out now.