score:1

Use tickInterval:

        yAxis: {
            min: 0,
            max: 200,

            title: {
                text: ''
            },
            tickInterval: 40,
            gridLineWidth: 1,
            gridLineColor: '#eaeaea'

        },

Fiddle: http://jsfiddle.net/manishie/U6NhV/

score:1

You can use tickPositions / tickPositioner

http://api.highcharts.com/highcharts#yAxis.tickPositions

or set min/max values as manishie mentioned.


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