I was told in a previous question that it was not hard to ensure that Excel would automatically set the minimum and maximum of a chart axis range to given percentages less and more than the observed minimum and maximum values in the range the chart is looking to plot.

But it was mentioned that I would need to use code or macros. I am not in anyway programer and rarely understand Excel macros and how they work

Despite this can someone help with me what that code might look like?

And how I might run the code on individual charts?