Invert Y Axis.

I see Apple didn’t get enough feedback to make this a simple case of ticking a box like in Excel.

I’m still unclear what is the most efficient and least time consuming way to get my Y axis to have the lowest values at the top particularly when I am dealing with large tables of constantly and varying data values?

Any help would be really appreciated as I want to conclude my project with a professional final product for the financial markets. (I am already now building the equivalent in Excel). Thanks.