I don’t know if cufflinks has added direct support for the stackgroup parameter. This would be a question for the cufflinks project (https://github.com/santosjorge/cufflinks).
Thanks, this is a nice workaround. Although it seems best to plot a scatter plot instead of line.
I did not realize that Cufflinks is an independent project. This not particularly clear from the documentation on Plotly’s website (e.g. https://plot.ly/ipython-notebooks/cufflinks/).