Same color for diagram and the associated values on the ax

[thestealth131205]

If you overlay several diagrams, it quickly becomes confusing on the sides.

If the values were colored appropriately, it would be easier

[uelpenich]

Go to the DataSource and choose the position and the color of the y-axis:

At the moment is possible to have only 1 y-axis left and right, all further y-axises overlap and are unreadable (see issue Multiple-Y-Axis #42 ).
With x-axis ticks and time -> time format you'll find a way to make the x-axis more readable.