<div id="chart"></div>
<script>
$("#chart").kendoChart({
  valueAxis: [{
    notes: {
      data: [{
        value: 2,
        text: "First note"
      }, {
        value: 4,
        text: "Second note"
      }]
    }
  }],
  series: [
    { data: [1, 2, 3, 4, 5] }
  ]
});
</script>