Edit in JSFiddle

var data = [
{date: new Date('2012-07-01'), MAU:1.007, DAU:0.584, "DAU / MAU": 57.99},
{date: new Date('2012-10-01'), MAU:1.056, DAU:0.618, "DAU / MAU": 58.52},
{date: new Date('2013-01-01'), MAU:1.110, DAU:0.665, "DAU / MAU": 59.91},
{date: new Date('2013-04-01'), MAU:1.155, DAU:0.699, "DAU / MAU": 60.52},
{date: new Date('2013-07-01'), MAU:1.189, DAU:0.728, "DAU / MAU": 61.23},
{date: new Date('2013-10-01'), MAU:1.228, DAU:0.757, "DAU / MAU": 61.64},
{date: new Date('2014-01-01'), MAU:1.276, DAU:0.802, "DAU / MAU": 62.85},
{date: new Date('2014-04-01'), MAU:1.317, DAU:0.829, "DAU / MAU": 62.95},
{date: new Date('2014-07-01'), MAU:1.350, DAU:0.864, "DAU / MAU": 64.00},
{date: new Date('2014-10-01'), MAU:1.390, DAU:0.890, "DAU / MAU": 64.03},
{date: new Date('2015-01-01'), MAU:1.441, DAU:0.936, "DAU / MAU": 64.95},
{date: new Date('2015-04-01'), MAU:1.490, DAU:0.968, "DAU / MAU": 64.97},
{date: new Date('2015-07-01'), MAU:1.510, DAU:1.010, "DAU / MAU": 67.00}
];

var chart = new tauCharts.Chart({
		dimensions: {
    	date: {type: 'order', scale: 'period'},
      MAU: {type: 'measure', scale: 'linear'},
      DAU: {type: 'measure', scale: 'linear'},
      'DAU / MAU': {type: 'measure', scale: 'linear'}
    },
		data:data,
    type: 'line',
    x: 'date',
    y: 'DAU / MAU',
    guide: {
        x: {
            label: { text: 'Time' },
            tickPeriod: 'quarter'
        },
        y: {
            label: { text:'Daily / Monthly, %' },
            autoScale: false,
            scaleOrient: 'right',
            textAnchor: 'start'
        }
    },
    plugins: [
        tauCharts.api.plugins.get('layers')({
            mode: 'dock',
            showPanel: true,
            // Default values:
            // title: "Layers",
            // label: "Layer Type",
            axisWidth: 55,
            layers: [
                {
                    type: 'bar',
                    y: 'MAU',
                    guide: {
                    		label: { text: 'Monthly Active Users' },
                        min: 0,
                        max: 1.5,
                        autoScale: false,
                        zIndex: -1
										}
                }
                ,
                {
                    type: 'bar',
                    y: 'DAU',
                    guide: {
                    		label: { text: 'Daily Active Users' },
                        min: 0,
                        max: 1.5,
                        autoScale: false,
                        zIndex: -1
										}
                }
						]
        })
        ,
        tauCharts.api.plugins.get('legend')()
        ,
        tauCharts.api.plugins.get('tooltip')()
    ]
});

chart.renderTo('#target');