The other day I was creating a dashboard that and one of the requirements was to show 0 in graphs if the value was Null. I searched the support forum and found this post but it didn't work. While looking through all the different graph options I finally found the one I needed. Under Options - Other you will find a drop down for " Use zero instead of null values ". Set this value to Yes and your graph will work as expected : Hope this helps someone else with the same issue.