Change Color of Volume Columns (High/Low) in HighCharts

Question

I\'ve got a simple chart showing candlesticks with volume columns underneath: http://jsfiddle.net/T83Xy/

Basically, I want to use black and red for the columns depending

Answer 1

This worked perfectly for me:

$(function () {
jQuery.getJSON('https://www.highcharts.com/samples/data/jsonp.php?filename=aapl-ohlcv.json&callback=?', function (data) {

    // split the data set into ohlc and volume
    var volumeColor = '';
    var ohlc = [],
        volume = [],
        dataLength = data.length,
        // set the allowed units for data grouping
        groupingUnits = [[
            'week',                         // unit name
            [1]                             // allowed multiples
        ], [
            'month',
            [1, 2, 3, 4, 6]
        ]],

        i = 0;

    for (i; i < dataLength; i += 1) {
        ohlc.push([
            data[i][0], // the date
            data[i][1], // open
            data[i][2], // high
            data[i][3], // low
            data[i][4] // close
        ]);
         if (i==0) {
        volumeColor = '#CCCCCC';
         } else {         
            if (data[i][1] >= data[i-1][1]) {
               volumeColor = '#006633';
            } else {
               volumeColor = '#CC0033';
            }
         }

        volume.push({
            x: data[i][0], // the date
            y: data[i][5],
            color: volumeColor
        });
    }


    // create the chart
    $('#container').highcharts('StockChart', {

        rangeSelector: {
            selected: 1
        },

        title: {
            text: 'AAPL Historical'
        },

        yAxis: [{
            labels: {
                align: 'right',
                x: -3
            },
            title: {
                text: 'OHLC'
            },
            height: '60%',
            lineWidth: 2
        }, {
            labels: {
                align: 'right',
                x: -3
            },
            title: {
                text: 'Volume'
            },
            top: '65%',
            height: '35%',
            offset: 0,
            lineWidth: 2
        }],

        series: [{
            type: 'candlestick',
            name: 'AAPL',
            data: ohlc,
            dataGrouping: {
                units: groupingUnits
            }
        }, {
            type: 'column',
            name: 'Volume',
            data: volume,
            yAxis: 1,
            turboThreshold: Number.MAX_VALUE,
            dataGrouping: {
                enabled: false,
                units: groupingUnits
            }
        }]
    });
});
});