anychart.onDocumentReady(function () {
var data1 = [166, 43, -79, -46, 84, NaN];
var data2 = [50, -25, 30, 28, 83, NaN];
var chart = anychart.waterfall();
chart.addSeries(data1, data2);
for (var i = 0; i < chart.getSeriesCount(); i++) {
chart.getSeriesAt(i).name((i + 1) + ' Series');
chart.legend({itemsSourceMode: 'default'});
chart.title('Get and use series count');
chart.container('container');