Using Business Intelligence Dashboard Designer : Creating a New Dashboard : Working with Dial Charts
  

Working with Dial Charts

For dial charts to display correctly, you must enter values for your range and the chart title. In the example below, the dial chart preview is displaying ranges associated with sales. Notice that each dial sector is represented by a color, red, yellow, or green. The needle is positioned in the 220796.48 range, indicating that total orders, while not stellar, are not near the danger zone indicated by the red sector in the dial.
http://infocenter.pentaho.com/help/topic/puc_user_guide/images/11_dial_chart_preview.png