Vertical axis incrementation for indicator window?

Hi,

I searched Google far and wide and have not found any way to have a vertical axis incrementation on my indicator windows, nor have I found any topic discussing it.

In MT4 the "show grid" option is there for the main price window and the horizontal increments are there for the indicator windows, but the vertical increments are not there for the indicator windows.

How I can I have vertical increment lines for the indicator windows?

Thanks so much!
Mark.

Ctrl-I -> Select indicator -> Click 'Edit' Button -> Select 'Levels' Tab -> Click 'Add' button to add new levels and enter the level value.

Thanks!