anychart.onDocumentReady(function () {
var dataTable = anychart.data.table();
dataTable.addData(get_dji_daily_short_data());
var mapping = dataTable.mapAs({high: 1, low: 3});
var chart = anychart.stock();
var series = plot.rangeStepArea(mapping);
series.fill(function () {
return this.sourceColor + ' 0.4';
chart.title('Set series fill parameter as a function');
chart.container('container');