Apex doesn’t allow for the line to continue on a null value. That said, I really like this plugin for most purposes.
If you want to do that, this plugin may be helpful. I made it for my purposes. I have null values in this list of values as I didnt collect a score for this measure on that day but did collect data and want to reflect this in the data anyway.
For now, you would need to have a valid date (Xaxis) value but could have a null Yaxis value and the line will span.
My next update will do this for you when using actual dates and not text strings.
