Chart Symbology

Discussion created by cevaughn_75681 on Jan 22, 2013
I am trying to use a chart symbology to display dissolved oxygen values over time at a monitoring well.  ArcGIS is only symbolizing those wells that have a value for each sampling event.  I have a few wells that have null values at various points because the well was dry.  Is there any way I can force it to symbolize these leaving out the null values?