[Solved]-HighCharts Stock Chart error code 18-Highcharts

I've figured it out finally!

GWT-HighCharts seems to be the problem. It does not add the new YAxis to the Chart at all. So you must add YAxis via native calls like this;

private static native void nativeAddAxis(JavaScriptObject chart, JavaScriptObject axisOptions, boolean isX, boolean redraw, boolean animationFlag) /*-{
    chart.addAxis(axisOptions, isX, redraw, animationFlag);
}-*/;

Just call this native method before adding the new series.

            // Create new series
        Series newSeries = chart.createSeries().setYAxis(index);
        newSeries.setPlotOptions(new LinePlotOptions().setColor(tag.getColor()));
        newSeries.setName(index + 1 + ") ");

        // Create a new YAxis
        YAxis yAxis = chart.getYAxis(index).setPlotLines(chart.getYAxis(index).createPlotLine().setValue(0).setWidth(1).setColor(tag.getColor())).setLabels(new YAxisLabels().setEnabled(false)).setTickLength(0).setOffset(60)
                .setStartOnTick(false).setEndOnTick(false).setGridLineWidth(0).setPlotLines().setMaxPadding(DEFAULT_YAXIS_MAX_PADDING).setMinPadding(DEFAULT_YAXIS_MIN_PADDING)
                .setAxisTitle(new AxisTitle().setText(null).setStyle(new Style().setColor(tag.getColor())));

        // IMPORTANT!: New YAxis must be added to the chart via native calls since gwt-highcharts wrapper doesn't do that properly!
        nativeAddAxis(chart.getNativeChart(), yAxis.getOptions().getJavaScriptObject(), false, false, false);

        // Physical attach
        chart.addSeries(newSeries);