Global Crosshair on prices e.g. ES and MES for better management

As Crosstrading still seems to be a thing of the far future and one does not know when it will be implemented, I highly recommend as a workaround that the global crosshair function should be expanded over all assets. E.g. while hovering with my mouse over ES, it shows the time and price (x- and y-axis) on the MES as well. Time (x-axis) is apparently working so I don´t see any problem why this is not possible with y-axis. This would help incredibly with managing crosstrading manually.

Hope this will get a few votes :)