Two y axes graph

I need to combine two different series ‘y’ with the same ‘x’ (dates), I just did it:
There is any way to set the y1 and y2 scales in order to start both lines in the same point, in order to see how each line behave related to the other?
In this example I need to draw the red line a litle higher.
Thanks in advance.

I found a solution generating a new line with base in the first data of one line (reference) and adding the daily delta of the other, then drawing that new line and the reference line in the same axis. Additionally I used the daily difference as a Delta and added as a bar in the secondary axes.