Multiple graphs on a chart

Generally, to add an additional graph to a chart you should use the addSeries method.
As a parameter, the method takes an object of the graph you'd like to add to the chart. The graph is specified in a standard way.

Single graph

Multiple graphs

var barChart =  new dhtmlXChart({
	view:"bar",
	container:"chartBox",
        value:"#sales#",
        color: "#58dccd",
        xAxis:{ template:"'#year#" }
});

var barChart =  new dhtmlXChart({..});
 
barChart.addSeries({
     view: "line",
     item:{  radius:0 },
     line:{  color:"#36abee" },
     value:"#sales3#"
});

If you add to the chart a graph of the same type, you can omit the view attribute:

Single graph

Multiple graphs

var barChart =  new dhtmlXChart({
	view:"bar",
	container:"chartBox",
        value:"#sales#",
        xAxis:{ template:"'#year#" }
});

var barChart =  new dhtmlXChart({..});
 
barChart.addSeries({
        value:"#sales2#",
	color:"#a7ee70"
});

Related methods

addSeries - adds the new data property representation
hideSeries - hides a series with the specified index
showSeries - shows a series with the specified index