How do you make a multiple cumulative time series?

I can make mulitple summed time series. source="splunk-source" | timechart sum(figure) as figure by category I can make a single cumulative summed time series. source="splunk-source" | timechart sum(figure) as figure | streamstats sum(figure) as cumulative_figure | timechart last(cumulative_figure) But I can't make multiple cumulative summed time series. I would appreciate some help with that.