Logarithmic Scale with gaps in data

by amcharts

HTML

<script type="text/javascript" src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/serial.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/none.js"></script>
<div id="chartdiv"></div>

CSS

#chartdiv {
	width	: 100%;
	height	: 500px;
}

JavaScript

var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
    "theme": "none",
     "pathToImages": "http://www.amcharts.com/lib/3/images/",
    "dataProvider": [{
        "date": "2012-03-01",
        "price": 20
    }, {
        "date": "2012-03-02",
        "price": 75
    }, {
        "date": "2012-03-03",
        "price": 15
    }, {
        "date": "2012-03-04",
        "price": 75
    }, {
        "date": "2012-03-05",
        "price": 158
    }, {
        "date": "2012-03-06"
    }, {
        "date": "2012-03-07"
    }, {
        "date": "2012-03-08"
    }, {
        "date": "2012-03-09",
        "price": 75
    }, {
        "date": "2012-03-10"
    }, {
        "date": "2012-03-11",
        "price": 158
    }, {
        "date": "2012-03-12",
        "price": 56
    }, {
        "date": "2012-03-13",
        "price": 169
    }, {
        "date": "2012-03-14",
        "price": 24
    }, {
        "date": "2012-03-15",
        "price": 147
    }],
    "valueAxes": [{
        "logarithmic": true,
        "dashLength": 1,
        "guides": [{
            "dashLength": 6,
            "inside": true,
            "label": "average",
            "lineAlpha": 1,
            "value": 90.4
        }],
        "position": "left"
    }],
    "graphs": [{
        "bullet": "round",
        "id": "g1",
        "bulletBorderAlpha": 1,
        "bulletColor": "#FFFFFF",
        "bulletSize": 7,
        "lineThickness": 2,
        "title": "Price",
        "type": "smoothedLine",
        "useLineColorForBulletBorder": true,
        "valueField": "price"
    }],
    "chartScrollbar": {},
    "chartCursor": {
        "cursorPosition": "mouse"
    },
    "dataDateFormat": "YYYY-MM-DD",
    "categoryField": "date",
    "categoryAxis": {
        "parseDates": true
    }
});