My first thought as well! The author of uPlot has a good demo illustrating their pitfalls https://leeoniya.github.io/uPlot/demos/stacked-series.html https://lee

My first thought as well! The author of uPlot has a good demo illustrating their pitfalls https://leeoniya.github.io/uPlot/demos/stacked-series.html https://leeoniya.github.io/uPlot/demos/stacked-series.html