title: How to: create a heat map of the market
body: <p>I am interested in creating a heat map of the stock market using internal data, in much the same way as the following site: <a href="http://www.smartmoney.com/map-of-the-market/" rel="nofollow noreferrer">http://www.smartmoney.com/map-of-the-market/</a></p>
  
  <p>We have all the data necessary to do so, as well as a C#/ASP.NET front end and a C#/SQL Server 2005 back end.</p>
  
  <p>Can anyone recommend any resources for creating this type of web application?  P.S. Free is better!</p>