"Values in reverse order" in Line chart

kfransis, I agree with greggyb, sorry, when you first stated the issue, you mentioned the x-axis which in certain circumstances you can control by sort order. But the y-axis I am not aware of a way to do this, in fact, if you try to set "end value" lower than "start value" in the paint brush, it does not like it and gives you a red outline and does not set it.

Would be a good thing to post in Ideas if not there already.