Create a custom line in a scatter chart

[JemmaD]

I have a scatter chart showing incoming money vs outgoing money split by location. So each dot is a location, the x axis is incoming money, and y axis is outgoing money.

I want a line in the graph where incoming = outgoings (so where the line meets the axis lines, the axis values are the same e.g. Y axis = 10M X axis = 10M. 

How do I do this?

[JemmaD · Accepted solution]

I found a solution using Symmetry Shading. This creates a shaded triangle where the values meet, and I changed the bottom half to green (for good) and the top half to red. Perfect.

[technolog]

That looks good=) It's not very famous option=)

[technolog]

You can try to create a new separate visual and place it on top.

[amitchandak]

@JemmaD , I doubt you can create such a line on the scatter visual. For that you need one categorical axis