Highcharts test tool

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="https://rawgithub.com/highslide-software/draggable-points/master/draggable-points.js"></script>

<div id="container" style="height: 300px"></div>
<div id="drag"></div>
<div id="drop"></div>

JavaScript

var chart = new Highcharts.Chart({

    chart: {
        renderTo: 'container',
        animation: false,
        zoomType: 'x',
        events: {
                    click: function(e) {
                        // find the clicked values and the series
                        var x = e.xAxis[0].value,
                            y = e.yAxis[0].value,
                            series = this.series[2];
    
                        // Add it
                        series.addPoint([x, y]);
    
                    }
                }
    },

    xAxis: {
        //categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    },
        
    plotOptions: {
        series: {
            cursor: 'ns-resize',
            point: {
                events: {
                     'click': function() {
                                if (this.series.data.length > 1) this.remove();
                            },
                    drag: function(e) {
                        
                        // Returning false stops the drag and drops. Example:
                        /*
                        if (e.newY > 300) {
                            this.y = 300;
                            return false;
                        }
                        */
                        $('#drag').html(
                            'Dragging <b>' + this.series.name + '</b>, <b>' +
                            this.category + '</b> to <b>' + 
                            Highcharts.numberFormat(e.newY, 2) + '</b>'
                        );
                    },
                    drop: function() {
                        $('#drop').html(
                            'In <b>' + this.series.name + '</b>, <b>' +
                            this.category + '</b> was set to <b>' + 
                            Highcharts.numberFormat(this.y, 2) + '</b>'
                        );
                    }
                }
            },
           ...