90 Degree Break At Start of Stacked Area Chart

I am creating a scatter combo chart with an x-y chart and a stacked area chart on it.
I want the stacked area chart to ignore the previous 0 points and show a 90-degree angle at the first non-zero data point, not a slope going from 0 at x=3 to the x=4 data value.
The stacked area chart data will be starting down the x-axis, not at x=0.
I tried 0, '' and na() for the blank data but no luck.
Thanks

Sloped Area Before.png Sloped Area After.png

Instead of 0 use =NA() for non-plotting area chart

See attached file

IMO, this is the definitive tutorial for how Excel charts handle blank cells (and how N/A offers a substitute for blank cells): https://peltiertech.com/plot-blank-c...-excel-charts/ Towards the end of the tutorial, Peltier describes the behavior of stacked charts. Pulling out one statement from the beginning of this section

Originally Posted by Jon Peltier

If you are trying to plot an empty cell as a gap, and it isn’t working, make sure you aren’t using a stacked chart type.

Of course, there's probably a reason you want a stacked area chart here. We might be able to help better if you will explain what the stacked area chart is doing and why it is essential.

My gut instinct is that, if both a stacked area and a vertical "gap" are essential parts of this chart, you are probably going to need to revert to the techniques described in this tutorial: https://peltiertech.com/excel-area-chart-with-gap/

Look over that and see what you think. Then let us know how you want to proceed and how we can help.