It's been awhile since I created my last report. Recently, I had to pick this up and create a burn down area chart. The remaining work data is set to something like "=iif(fields!date <= today(), sum(fields!remainingwork.value), nothing). I was expecting to see a nice cut off line of the burn down chart on the current day, where future days is blank. However, the report zeros the data on the next date and the chart ended up with a sharp line from the remaining work of the current day down to zero on the next day.
After some digging around and playing around, I found out that this issue can be fixed by simply setting the EmptyPoint\Color to "No Color". Here are the steps:
1. Select the data series on the chart design section.
2. On the properties panel, expand the EmptyPoint node and set the color to "No Color".
Simple as that.