Chart Label Overflow

HTML

<body class="claro">
<div id="chart"></div>
<div id="legend"></div>
</body>

CSS

#chart {
    width: 600px;
    height: 300px;
}

JavaScript

require(["dojox/charting/Chart",
                "dojox/charting/action2d/Magnify",
                "dojox/charting/action2d/Highlight",
                "dojox/charting/action2d/Tooltip",
                "dojox/charting/widget/Legend",
                "dojox/charting/themes/PlotKit/green",
                "dojox/charting/plot2d/StackedLines",
                "dojox/charting/action2d/MouseIndicator",
                "dojox/charting/axis2d/Default",
                "dojo/ready"
            ], function(Chart, Magnify, Highlight, Tooltip, Legend, theme_green, _lines, MouseIndicator, _axis, ready) {
    // wrapped in domready event
    ready(function() {
        // create a chart with placeholder div#charty
        var chart2 = new Chart("chart");
        chart2.setTheme(theme_green);
        chart2.addPlot("default", {
            type: "StackedLines",
            markers: true,
            // create round dots on plot-points
            tension: 3,
            // curve slightly
            shadows: { // add shadow
                dx: 2,
                dy: 2,
                dw: 2
            }
        });
        chart2.addAxis("x", {
            min: 0,
            majorTick: {
                stroke: "black",
                length: 3
            },
            minorTick: {
                stroke: "gray",
                length: 3
            }
        });
        chart2.addAxis("y", {
            vertical: true,
            min: 0,
            max: 6,
            majorTick: {
                stroke: "black",
                length: 3
            },
            minorTick: {
                stroke: "gray",
                length: 3
            }
        });
        // each point, added to a series.
        // note the first entry in Series A which has the 
        // customizable object notation
        // Hover mouse over lower left point (first red square"
        chart2.addSeries("Series A", [{
            x: 0.5,
            y: 3.5,
            tooltip:...