startValue: Number/Date/Timestamp

Sets the minimum / starting value of viewport of all the charts. startValue can be defined in numeric or dateTime values (in the form of Date object or timestamp).

• If startValue is not set, it’s automatically calculated based on data passed to the StockChart.
• While setting startValue, it should be taken care that endValue should be greater than startValue.
• startValue can be overridden by setting minimum property of Slider.

var stockChart = new CanvasJS.StockChart("container",
{
 .
 .
 rangeSelector: {
    inputFields: {
      startValue: new Date(2017, 06, 01),
      .
    }
 },
 .
 .
});
stockChart.render();