Set at the same level the unit of two yaxis highcharts - highcharts

Question

I would like to set at the same level 2 yAxis with highcharts. Because it's difficult to explain what I want, this picture should help you to understand :
I want to align the two "0" value of my 2 charts.
This is my current code :
$(function () {
$('#tresorerieChart').highcharts({
chart: {
zoomType: 'xy'
},
title: {
text: 'Average Monthly Temperature and Rainfall in Tokyo'
},
subtitle: {
text: 'Source: WorldClimate.com'
},
xAxis: [{
categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
}],
yAxis: [{ // First yAxis
labels: {
format: '{value}°C',
style: {
color: Highcharts.getOptions().colors[1]
}
},
title: {
text: 'Temperature',
style: {
color: Highcharts.getOptions().colors[1]
}
}
},
{ // Third yAxis
title: {
text: 'Rainfall',
style: {
color: Highcharts.getOptions().colors[0]
}
},
labels: {
format: '{value} mm',
style: {
color: Highcharts.getOptions().colors[0]
}
},
opposite: true
}],
tooltip: {
shared: true
},
legend: {
layout: 'vertical',
align: 'left',
x: 120,
verticalAlign: 'top',
y: 100,
floating: true,
backgroundColor: (Highcharts.theme && Highcharts.theme.legendBackgroundColor) || '#FFFFFF'
},
series: [{
name: 'Rainfall',
type: 'column',
yAxis: 1,
data: [49.9, -71.5, 106.4, -129.2, 144.0, -176.0, -135.6, 148.5, 216.4, 194.1, -95.6, 54.4],
tooltip: {
valueSuffix: ' mm'
}
}, {
name: 'Temperature',
type: 'spline',
data: [-7.0, -6.9, -9.5, -14.5, -18.2, -21.5, -25.2, -26.5, -23.3, -18.3, -13.9, -9.6],
tooltip: {
valueSuffix: '°C'
}
},
{
name: 'Temperature',
type: 'spline',
data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6],
tooltip: {
valueSuffix: '°C'
}
}]
});
});
Thanks in advance.

Answer 1

Long time ago I have created example how to align two yAxis to the same value, you can find this here: http://jsfiddle.net/5m9JW/414/
Code responsible for linking axes:
var i = 15;
while (chart.yAxis[1].translate(0) != chart.yAxis[0].translate(0) && i > 0) {
chart.yAxis[0].setExtremes(chart.yAxis[0].getExtremes().min - chart.yAxis[0].translate(chart.yAxis[1].translate(0), true));
i--;
};