Thanks for getting back to me. While that would work great for just this case, I'm looking for a more general solution. I.e. This chart is being used to display data that doesn't always have a max value of 2. Fundamentally what I'm wondering is if i have to find the max value of the chart i'm creating and then from there decide the best number of div lines (every time i render the chart) or if theres some kind of prepackaged setting I can use to make these decisions for me. Thanks a lot!!!