Because the Yellow Brick Road slopes up or down, there's an optical illusion effect that happens where the numbers on the right and the numbers on the left don't seem to match up. That also makes it difficult to see where exactly your data points are, whether a line is diagonal or straight, and even where the center and edges of your Road are. If we could turn on a "graph paper" option in advanced settings, where the big horizontal tick marks (or vertical ones, for those that want) go all the way through the graph, those problems would be solved.