diff --git a/demo/src/telemetry/DemoTelemetryProvider.js b/demo/src/telemetry/DemoTelemetryProvider.js
index 0095711e3a..61562b9627 100644
--- a/demo/src/telemetry/DemoTelemetryProvider.js
+++ b/demo/src/telemetry/DemoTelemetryProvider.js
@@ -51,12 +51,23 @@ define(
             var offsets = {};
 
             function wrapSeries(telemetrySeries, offset) {
+                var phaseOffset = Math.floor(Math.random(1000));
+                function phaseShift(index, length) {
+                    return (phaseOffset + index) % length;
+                }
                 return {
                     getDomainValue: function (index, domain) {
                         return telemetrySeries.getDomainValue(index, domain);
                     },
                     getRangeValue: function (index, range) {
-                        return Math.random(1)/50 + telemetrySeries.getRangeValue(index, range) + offset;
+                        // Sine wave 'carrier' signal, with random phase shift
+                        return telemetrySeries.getRangeValue(phaseShift(index,telemetrySeries.getPointCount()) , range)
+                        // Introduce some random variability so that line is
+                        // not straight or perfectly curved
+                            + Math.random(1)/50
+                        //Add a random range offset so that lines
+                        // are not all bunched together
+                            + offset;
                     },
                     getPointCount: function () {
                         return telemetrySeries.getPointCount();