Replied 10 September 2017, 11:41 am EST
I am not clear about your requirement since we cannot display null values on the linechart.
By default, LineChart does not breaks the line when it encounters any null value where null value refers to the value which is defined as Hole value.
But, if you wish to display a continous line irrespective of data hole values then you may set the Display value of that DataSeries to ExcludeHole.
If I misunderstood your query then kindly provide more information on same along with a small sample or image replicating the same.