Fixed #6203, yAxis extremes were wrong calculated for visible scatter…

… points

js/parts/Series.js

@@ -870,7 +870,7 @@ H.Series = H.seriesType('line', null, { // base series options
 			// visible range, consider y extremes
 			validValue = (isNumber(y, true) || isArray(y)) && (!yAxis.positiveValuesOnly || (y.length || y > 0));
 			withinRange = this.getExtremesFromAll || this.options.getExtremesFromAll || this.cropped ||
-				((xData[i + 1] || x) >= xMin &&	(xData[i - 1] || x) <= xMax);
+				((xData[i] || x) >= xMin &&	(xData[i] || x) <= xMax);
 
 			if (validValue && withinRange) {
 
@@ -886,6 +886,7 @@ H.Series = H.seriesType('line', null, { // base series options
 				}
 			}
 		}
+
 		this.dataMin = arrayMin(activeYData);
 		this.dataMax = arrayMax(activeYData);
 	},

samples/issues/highstock-5.0.9/6203-wrong-yaxis-extremes-scatter/demo.details

@@ -0,0 +1,5 @@
+---
+ resources:
+   - https://code.jquery.com/qunit/qunit-2.0.1.js
+   - https://code.jquery.com/qunit/qunit-2.0.1.css
+...

samples/issues/highstock-5.0.9/6203-wrong-yaxis-extremes-scatter/demo.html

@@ -0,0 +1,6 @@
+<script src="https://code.highcharts.com/stock/highstock.js"></script>
+
+<div id="qunit"></div>
+<div id="qunit-fixture"></div>
+
+<div id="container" style="width: 600px; margin: 0 auto"></div>

samples/issues/highstock-5.0.9/6203-wrong-yaxis-extremes-scatter/demo.js

@@ -0,0 +1,27 @@
+$(function () {
+	QUnit.test('yAxis extremes should adapt to visible points, not all.', function (assert) {
+		var chart = Highcharts.stockChart('container', {
+				series: [{
+				  data: [1, 2, 3, 4, 5, 3, 2, 1, 2, 4, 5, 8, 6, 4, 2, 3, 4, 2, 3, 4, 5, 6, 3, 2, 1, 2, 3, 4, 5, 6, 7, 3]
+				}, {
+					type: "scatter",
+					data: [{
+					x: 4,
+					y: 200,
+					}, {
+					x: 10,
+					y: 2,
+					}],
+
+				}]
+			});
+
+		chart.xAxis[0].setExtremes(8, 10);
+
+		assert.deepEqual(
+			chart.yAxis[0].max,
+			10,
+			'yAxis extremes adapted to visible scatter points.'
+		);
+	});
+});