http://stackoverflow.com/questions/32407355/dynamically-adding-scale-markers

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script nonce="undefined" src="https://cdn.zingchart.com/zingchart.min.js"></script>
  <style></style>
</head>

<body>
  <div id='myChart'></div>
  <button id='addMarker'>Add Scale-X Marker</button>
  <script>
    ZC.LICENSE = ["569d52cefae586f634c54f86dc99e6a9", "b55b025e438fa8a98e32482b5f768ff5"];
    var myConfig = {
      type: "bar",
      scaleX: {
        markers: []
      },
      series: [{
        values: [35, 42, 67, 89, 25, 34, 67, 85]
      }]
    };

    zingchart.render({
      id: 'myChart',
      data: myConfig,
      height: 400,
      width: 600
    });

    var onClick = function() {

      myConfig.scaleX.markers = [{
        type: 'area',
        range: [0, 1],
        label: {
          text: "Hello world!"
        }
      }];

      zingchart.exec('myChart', 'setdata', {
        data: myConfig
      });

    }

    var addMarker = document.querySelector('#addMarker');
    if (addMarker) {
      addMarker.addEventListener('click', onClick);
    }
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script src="https://cdn.zingchart.com/zingchart.min.js"></script>
</head>

<body>
  <div id='myChart'></div>
  <button id='addMarker'>Add Scale-X Marker</button>
</body>

</html>

var myConfig = {
  type: "bar",
  scaleX: {
    markers: []
  },
  series: [{
    values: [35, 42, 67, 89, 25, 34, 67, 85]
  }]
};

zingchart.render({
  id: 'myChart',
  data: myConfig,
  height: 400,
  width: 600
});

var onClick = function() {

  myConfig.scaleX.markers = [{
    type: 'area',
    range: [0, 1],
    label: {
      text: "Hello world!"
    }
  }];

  zingchart.exec('myChart', 'setdata', {
    data: myConfig
  });

}

var addMarker = document.querySelector('#addMarker');
if (addMarker) {
  addMarker.addEventListener('click', onClick);
}