anychart.onDocumentReady(function () {
var chart = anychart.sparkline([1, 4, -7, 1, -3, 6, -8, 3]);
chart.seriesType('column');
chart.negativeHatchFill('backward_diagonal', '#FAFAFA', 2, 10);
chart.title({text: 'Set hatch fill parameters for negative points', orientation: 'top'});
chart.container('container');