FusionCharts - Vertical Zero Plane in charts with numeric x-axis

Showing only specific data values of a chart

HTML

<script src="http://static.fusioncharts.com/code/latest/fusioncharts.js"></script>
<script src="http://static.fusioncharts.com/code/latest/fusioncharts.charts.js"></script>
<script src="http://static.fusioncharts.com/code/latest/themes/fusioncharts.theme.fint.js"></script>

<div id="chart-container">FusionCharts will render here</div>

JavaScript

FusionCharts.ready(function () {
    var profitChart = new FusionCharts({
        type: 'scatter',
        renderAt: 'chart-container',
        id: 'myChart',
        width: '500',
        height: '350',
        dataFormat: 'json',
        dataSource: {
            "chart": {
                "caption": "Old Stock Clearance",
                "subcaption": "Price Vs Profit",
                "yaxisname": "Price (In USD)",
                "xaxisname": "Profit (In %)",
                
                "yaxismaxvalue": "1000",
                "xnumbersuffix": "%",
                "ynumberprefix": "$",
                
                //attributes used to define x-axis limits
                "xaxismaxvalue": "40",
                "xaxisminvalue": "-20",
                
                //Theme
                "theme" : "fint"
            },
            "dataset": [
                {
                    "drawline": "0",
                    "seriesname": "Televisions",
                    "color": "#6baa01",
                    "anchorsides": "3",
                    "anchorradius": "4",
                    "anchorbgcolor": "#6baa01",
                    "anchorbordercolor": "#6baa01",
                    "data": [
                        {
                            "id": "TV_1",
                            "x": "-9.89",
                            "y": "642"
                        }, 
                        {
                            "id": "TV_2",
                            "x": "21.59",
                            "y": "947"
                        }, 
                        {
                            "id": "TV_3",
                            "x": "-8.8",
                            "y": "433"
                        }, 
                        {
                            "id": "TV_4",
                            "x": "-10.88",
                            "y": "750"
                        }, 
                        {
                            "id":...