Vertical axis formatting: How do I keep chart Axis Y consistent for several charts

Hi all,

I'm just dealing with the following issue I would like to share with you:

- I've got several charts having the same content of horizontal axis (the same period of time), but different vertical axis
- Each chart shows the FOREX exposure for one currency and therefore differs in values

- The challenge is to make sure one can quickly compare the situation without examination of the numbers
=> Therefore I would need having "0" value every time on the same spot on the vertical axis, so that one can quickly see if the current state is positive or negative.

Would any of you had the idea how to set up such charts (vertical axis)?

I would be very grateful for any answer

Thank you!