Dates instead of values on Highchart labels in graph with multiple axis - highcharts

Question

I've created a line and a bar graph that share the xAxis. But for some reason it chooses to display the value instead of date, even though I am supplying it the standard way.
What am I missing here?
Fiddle: http://jsfiddle.net/ZfP84/
$(function () {
var options = {
chart: {
renderTo: 'container',
},
navigator:{
enabled:true
},
scrollbar: {
enabled:true
},
rangeSelector: {
enabled: true,
//selected: 1
},
xAxis: {
gridLineWidth: 1,
labels: {
rotation: -45,
align: 'right',
style: {
fontSize: '13px',
fontFamily: 'Verdana, sans-serif'
}
}
},
yAxis: [
{
height: 150,
lineWidth: 2,
offset: 0,
title: {
text: 'Price',
}
},
{
top: 225,
//lineWidth: 0,
//min: 0,
//max: 5,
gridLineWidth: 0,
offset: 0,
height: 100,
title: {
text: 'Volume',
}
},
],
series: [
{
yAxis: 0,
name: 'Price by time',
stack: 0,
//data: [1, 12, 32, 43],
data: [[1147651200000,67.79],[1147737600000,64.98],[1147824000000,65.26],[1147910400000,63.18],[1147996800000,64.51],[1148256000000,63.38],[1148342400000,63.15],[1148428800000,63.34],[1148515200000,64.33],[1148601600000,63.55],[1148947200000,61.22],[1149033600000,59.77],[1149120000000,62.17],[1149206400000,61.66],[1149465600000,60.00],[1149552000000,59.72],[1149638400000,58.56],[1149724800000,60.76],[1149811200000,59.24],[1150070400000,57.00],[1150156800000,58.33],[1150243200000,57.61],[1150329600000,59.38],[1150416000000,57.56],[1150675200000,57.20],[1150761600000,57.47],[1150848000000,57.86],[1150934400000,59.58],[1151020800000,58.83],[1151280000000,58.99],[1151366400000,57.43],[1151452800000,56.02],[1151539200000,58.97],[1151625600000,57.27],[1151884800000,57.95],[1152057600000,57.00],[1152144000000,55.77],[1152230400000,55.40],[1152489600000,55.00],[1152576000000,55.65],[1152662400000,52.96],[1152748800000,52.25],[1152835200000,50.67],[1153094400000,52.37],[1153180800000,52.90],[1153267200000,54.10],[1153353600000,60.50],[1153440000000,60.72],[1153699200000,61.42],[1153785600000,61.93],[1153872000000,63.87],[1153958400000,63.40],[1154044800000,65.59],[1154304000000,67.96],[1154390400000,67.18],[1154476800000,68.16],[1154563200000,69.59],[1154649600000,68.30],[1154908800000,67.21],[1154995200000,64.78],[1155081600000,63.59],[1155168000000,64.07],[1155254400000,63.65],[1155513600000,63.94],[1155600000000,66.45],[1155686400000,67.98],[1155772800000,67.59],[1155859200000,67.91],[1156118400000,66.56],[1156204800000,67.62],[1156291200000,67.31],[1156377600000,67.81],[1156464000000,68.75],[1156723200000,66.98],[1156809600000,66.48],[1156896000000,66.96],[1156982400000,67.85],],
tooltip: {
valueDecimals: 2
},
},
{
name: 'Volume by time',
yAxis: 1,
stack: 0,
data: [[1147651200000,67.79],[1147737600000,64.98],[1147824000000,65.26],[1147910400000,63.18],[1147996800000,64.51],[1148256000000,63.38],[1148342400000,63.15],[1148428800000,63.34],[1148515200000,64.33],[1148601600000,63.55],[1148947200000,61.22],[1149033600000,59.77],[1149120000000,62.17],[1149206400000,61.66],[1149465600000,60.00],[1149552000000,59.72],[1149638400000,58.56],[1149724800000,60.76],[1149811200000,59.24],[1150070400000,57.00],[1150156800000,58.33],[1150243200000,57.61],[1150329600000,59.38],[1150416000000,57.56],[1150675200000,57.20],[1150761600000,57.47],[1150848000000,57.86],[1150934400000,59.58],[1151020800000,58.83],[1151280000000,58.99],[1151366400000,57.43],[1151452800000,56.02],[1151539200000,58.97],[1151625600000,57.27],[1151884800000,57.95],[1152057600000,57.00],[1152144000000,55.77],[1152230400000,55.40],[1152489600000,55.00],[1152576000000,55.65],[1152662400000,52.96],[1152748800000,52.25],[1152835200000,50.67],[1153094400000,52.37],[1153180800000,52.90],[1153267200000,54.10],[1153353600000,60.50],[1153440000000,60.72],[1153699200000,61.42],[1153785600000,61.93],[1153872000000,63.87],[1153958400000,63.40],[1154044800000,65.59],[1154304000000,67.96],[1154390400000,67.18],[1154476800000,68.16],[1154563200000,69.59],[1154649600000,68.30],[1154908800000,67.21],[1154995200000,64.78],[1155081600000,63.59],[1155168000000,64.07],[1155254400000,63.65],[1155513600000,63.94],[1155600000000,66.45],[1155686400000,67.98],[1155772800000,67.59],[1155859200000,67.91],[1156118400000,66.56],[1156204800000,67.62],[1156291200000,67.31],[1156377600000,67.81],[1156464000000,68.75],[1156723200000,66.98],[1156809600000,66.48],[1156896000000,66.96],[1156982400000,67.85],],
tooltip: {
valueDecimals: 2
},
lineWidth: 3,
marker: {
enabled: false
},
type: 'column',
},
]
};
var chart = new Highcharts.Chart(options);
});

Answer 1

If you added the the "type" to the xAxis definition then the x values will be interpreted as dates and times rather than decimal values
xAxis: {
type : "datetime", //add this line
gridLineWidth: 1,
labels: {
rotation: -45,
align: 'right',
style: {
fontSize: '13px',
fontFamily: 'Verdana, sans-serif'
}
}
},
you may have to fiddle with the start times and intervals to get HighChart to correctly interpret your x-values.
see this demo on the highchart website as an example. http://jsfiddle.net/gh/get/jquery/1.9.1/highslide-software/highcharts.com/tree/master/samples/highcharts/demo/line-time-series/

Answer 2

The reason is that you are not actually creating a Stock chart. Your code looks like:
var chart = new Highcharts.Chart(options);
If you want it to be a Stock chart do:
var chart = new Highcharts.StockChart(options);
A Chart by default is a category chart. StockChart is time-based.

Answer 3

You can use dateFormat to replace time in miliseconds with date.
http://jsfiddle.net/3bE4X/
formatter:function(){
return Highcharts.dateFormat('%d / %m / %Y',this.value);
}
http://api.highcharts.com/highcharts#Highcharts.dateFormat()