Here I am showing how to use sharepoint designer 2007 to do conditional formatting. There may be situations where you want to show Red Signal to some values in a list if it is less than a specific value.
Here I am taking the example, BPI (Type is number) be a column in a list .If the value of BPI greater than or equal to 10, I am showing a Green Circle. If BPI value greater than 5 and less than 10 Yellow diamond If less than 5 Red diamond.