Excellant, Thanks Frank that works a treat.
It might be good in a future version of ChartFX to have readonly cells in the DataEditor or readonly series.
As in our case we want to display a current live series which can be edited and have several historic series shown on the chart but not editable.
Setting Handled = true will work though we`ll have to display a dialog stating that the series is not editable ,as its historic, which from a usability perspective works but isn`t ideal.