This won't look much like your image, but it may achieve part of the goal. If you want to display the X and Y coordinates of particular points, you could pin the hover labels. I've used "Replace Text..." from the pinned hover label's context menu(right click) on the upper hover label to remove the row number. If needed, further customization can be done when using 'Replace Text'.
I've also used Ian's idea to add reference lines using the numbers in the pinned hover labels.
With the crosshair tool, the accuracy of the X and Y values are dependent on how well you center the crosshair over a point. Pinned hover labels will show you the actual data value.
I hope this helps,
- John