[Solved]-How to display averages in highcharts?-Highcharts

if you are using datetime xaxis you can use highstock and use the datagrouping property for that:

plotoptions: {
        line: {
            enabled: true,
            forced: true,
            datagrouping: {
                approximation: 'average',
                units: [
                    [
                        'month', [1]]
                ]
            }
        }
    }

this will automatically group your daily data to average of month. here's the demo