anychart.onDocumentReady(function () {
var stage = anychart.graphics.create("container", 600, 400);
var chart = anychart.gauges.linear([15, 20, 25, 30, 44]);
var barPointer = chart.bar(2);
barPointer.fill("#4CAF50", 0.4);
chart.title("Set pointer fill with opacity");