Candlestick Chart Example

An example of a Google Candlestick Chart.

by jhorvath

HTML

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
       <div id="chart_div" style="width: 900px; height: 500px;"></div>

JavaScript

google.charts.load('current', {'packages':['corechart']});
      google.charts.setOnLoadCallback(drawChart);

  function drawChart() {
    var data = google.visualization.arrayToDataTable([
      ['Mon', 20, 28, 38, 45],
      ['Tue', 31, 38, 55, 66],
      ['Wed', 50, 55, 77, 80],
      ['Thu', 77, 77, 66, 50],
      ['Fri', 68, 66, 22, 15]
      // Treat first row as data as well.
    ], true);

    var options = {
      legend:'none'
    };

    var chart = new google.visualization.CandlestickChart(document.getElementById('chart_div'));

    chart.draw(data, options);
  }
 
 function generateLotOfData() {
 var prices = [];
 	for(var i = 0; i < 100; i++) {
  	var price = generateData();
    prices.push(price);
  }
 }
 
  function generateData() {
var  rnd = Math.random(); // generate number, 0 <= x < 1.0
var change_percent = 2 * volatility * rnd;
if (change_percent > volatility)
    change_percent -= (2 * volatility);
var change_amount = old_price * change_percent;
var new_price = old_price + change_amount;
  }