CanvasJS Graphing

Graphing canvasJS adding new points over time

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<br/><!-- Just so that JSFiddle's Result label doesn't overlap the Chart -->
<div id="chart" style="height: 360px; width: 100%;"></div>

JavaScript

$(function() {
    
//empty out anything left over from graph
$('#chart').empty();    
    
var lineChart = null;
var dataPoints = [];
$.get("https://min-api.cryptocompare.com/data/histominute?fsym=LTC&tsym=USD&limit=60&aggregate=1&e=CCCAGG", function(data) {


$.each(data.Data, function(k,v) {
	var getTime = new Date(0);
	getTime.setUTCSeconds(v.time);
	dataPoints.push({x: getTime, y: v.close});
});

lineChart = new CanvasJS.Chart("chart", {
    theme: "light2",
    zoomEnabled: true,
    exportEnabled: false,
    animationEnabled: true,
    backgroundColor: "transparent",
    title: {
      text: "LTC"
    },
    legend: {
      horizontalAlign: "center",
      verticalAlign: "bottom",
      fontSize: 14
    },
    toolTip: {
      contentFormatter: function (e) {
        return e.entries[0].dataSeries.name + ": " + e.entries[0].dataPoint.y + ", Time: " + CanvasJS.formatDate(e.entries[0].dataPoint.x, "hh:mm TT");
      }
    },
    axisY: {
        labelFormatter: function(e){
				return  "$ " + e.value;
			},
        includeZero: false,
        labelFontSize: 14,
    },
    axisX: {
        intervalType: "minute",
        valueFormatString: "hh:mm TT", 
        labelFontSize: 14,
    },
    data: [
      {
        type: "area",
        name: "Price",
        showInLegend: true,
        legendText: "LTC",
        color: "#6abedb",
        fillOpacity: .5, 
        xValueType: "dateTime",
        dataPoints: dataPoints
      }
    ]
  });

  lineChart.render();
});
var num = 0;
updateLineChart();
function updateLineChart() {
    if (num === 0) {
        num++;

    } else {
  $.get("https://min-api.cryptocompare.com/data/histominute?fsym=LTC&tsym=USD&limit=1&aggregate=1&e=CCCAGG", function (data) {
    var getTime = new Date(0);
    getTime.setUTCSeconds(data.Data[1].time);
    dataPoints.push({x: getTime, y: data.Data[1].close});
    
      console.log(dataPoints.length);
/*
      if (dataPoints.length > 60) {
        delete dataPoints[0];
    }
*/
      
   ...