Chartjs-How to create multiple series on dx-Chartjs

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You can use this: http://phonejs.devexpress.com/Documentation/Howto/Data_Layer?version=13_2#Data_Layer_Reading_Data_Grouping

var dataSource = new DevExpress.data.DataSource(data);
dataSource.group("ratingDate","truMetric" );
dataSource.load().done(function(result) {
    var chart_data=[];
    for(var i=0;i<result.length;i++){
        var d={ratingDate:result[i].key};
        for(var j=0;j<result[i].items.length;j++){
            d[result[i].items[j].key]=result[i].items[j].items[0].score;
        }
        chart_data.push(d);
    }
$("#chartContainer").dxChart({
    dataSource:chart_data,
    // rest of your code

        series: [
            { valueField: "Recommend", name:"Recommend",  color: '#66cc33' },
            { valueField: "Service", name:"Service",  color: '#35a2f4' },
            { valueField: "Product", name:"Product", color: '#ef4e3a' },
            { valueField: "Experience", name:"Experience",  color: '#fea000' }
        ],

//rest of your code

Full fiddle: http://jsfiddle.net/2Bq9k/1/

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