Highcharts: Ensure y-Axis 0 value is at chart bottom

Question

I'm outputting a series of highcharts on a page. In some instances, all data for the specified time period may come back with 0 values.

In such a case, the chart looks like this: http://jsfiddle.net/charliegriefer/KM2Jx/1/

There is only 1 y-Axis label, 0, and it's in the middle of the chart.

I'd like to force that 0 value for the y-Axis to be at the bottom of the chart, which would be consistent with other charts on the page that do have data.

Have tried various yAxis properties, such as "min: 0", "minPadding: 0", "maxPadding: 0", "startOnTick: true".

Seems it should be pretty straightforward, but I'm at a loss :(

Relevant yAxis code:

yAxis: {
    min: 0, 
    minPadding: 0, 
    startOnTick: true, 
    title: {
        text: ""
    }
},

Answer 1

I've found another (and very simple) solution:

You can set y-axis minRange property:

yAxis: {
    ...
    minRange : 0.1
}

This makes Highcharts render yAxis min and max values when all data is 0.

UPDATE:

Highcharts 4.1.9 fix also needs:

        plotOptions: {
            line: {
                softThreshold: false
            }
        }

updated js fiddle