Get multiple "position Y" from "Multi-plot" cursor as Array

Im looking for a good way to get multiple "position Y" value from "Multi-plot" cursor on XY Graph.

I believe you can see what I want by following image.

In this case, getting "NaN" is really important and very useful for my application,

Using Cursor.Plot property is one of solution but, I don't want to change focusing plot to others

because it make reading "NaN" on others impossible.

I have already read following thread but couldn't solve my problem.

Mixed Signal Graph: Cursor Position Property for Multi-Plot Cursor

Similar to what I want to do but positionX should be written from property node.

Multiplot Cursor Values

Im really appreciate if you give me a advice.

Thanks,

Emboar