问高图表不会显示数据

EN

     var now = new Date();
        $('#container').highcharts({
            chart: {
                type: 'line',
            },
            title: {
                text: 'Bitcoin Price',
            },
            subtitle: {
                text: 'Source: MtGox.com',
            },
            xAxis: {
                type: 'datetime'
            },
        plotOptions: {
        series: {
            pointStart: Date.UTC(now.getYear(), now.getMonth(), now.getDate()),
            pointInterval: 24 * 3600 * 1000 // one day
        }
    },
            yAxis: {
                title: {
                    text: 'Price'
                },
            },

            series: [{
                name: 'Bitcoin',
                data: series
            }]
        });

    }  
  });

});