@ragu1991nathan,
You can add a dummy line dataSeries with x-values based on stripLines values and use indexLabel to show the length between the stripLines. Please find the code snippet for the same below.
chart.addTo("data", {
type: "line",
toolTipContent: null,
highlightEnabled: false,
markerSize: 0,
dataPoints: [
{ x: striplines[0].get("value"), y: (chart.axisY[0].viewportMaximum + chart.axisY[0].viewportMinimum) / 2 },
{ x: (striplines[1].get("value") + striplines[0].get("value")) / 2, y: (chart.axisY[0].viewportMaximum - chart.axisY[0].viewportMinimum) / 2, indexLabel: (striplines[1].get("value") - striplines[0].get("value")).toString()},
{ x: striplines[1].get("value"), y: (chart.axisY[0].viewportMaximum - chart.axisY[0].viewportMinimum) / 2 }
]
});
Please check this JSFiddle for a working example.
—
Thangaraj Raman
Team CanvasJS