In v6.5 I liked to set the horizontal gridlines to be 4 ticks apart.
I did this by setting the Chart Properties -> "Horizontal grid line interval (intraday only)" property = 4
In v7.0. This property still exists but it has moved.
Instead of Right Clicking on the Chart & looking at Chart Ptoperties.
Try Right Clicking on the numbers of the Right Hand Axis. This opens the "Chart Panel Properties" dialog.
then change "Horizontal grid lines interval value".
Hope this helps