Number of shown values
From semantic-mediawiki.org
Fragment of a discussion from Help talk:Jqplotchart format
> So it's not meant for a large number of data?
Help:Dygraphs format is a better fit for large data sets such as Demo:Dygraphs/Daily Temperatures in New York vs. San Francisco or Demo:Dygraphs/Annotate gas chromatogram (10K data points).
> I would llike to display the property value (the date) on the x-axis instead of the pagename (random number)
I cannot remember (maybe) something like Demo:Jqplotseries/Stacked_series?