Overlaying a trend line series over a stacked bar chart. How please?

[Czeshirecat]

Winforms. Jan 2022 software version.
I'm converting a very old version of teechart chart into Telerik RadChartView

What I'm seeing is this

What I want is, as in the following chart, where the stacked bars are overlayed with a trend line.
In the above, the stacked bar and line series are both using the same horizontal category axis but the line chart is following on from, rather than overlaying the stacked bars. I did try creating a 2nd category axis but then the auto scaling of the 2nd axis wasnt the same as the first. Stacking the line series didn't work either

How do I fix this please? There's only 2 points defined for the trend chart.

[Dess | Tech Support Engineer, Principal]

Hello, Claire,

Note that the CategoricalAxis adds the axis values in the order of adding the data points. If the BarSeries and the LineSeries share common axis values, they will be placed at the same location on the chart view. 

I have prepared a sample code snippet for your reference demonstrating how to achieve a similar result is the desired one: 

            Random rand = new Random();
            
            BarSeries barSeries = new BarSeries(); 
 
            for (int i = 0; i < 20; i++)
            { 
                barSeries.DataPoints.Add(new CategoricalDataPoint(rand.Next(1, 200), i)); 
            }
            
            LineSeries lineSeries = new LineSeries();
            lineSeries.PointSize = new SizeF(8, 8);
            lineSeries.Shape = new DiamondShape();
            lineSeries.DataPoints.Add(new CategoricalDataPoint(rand.Next(1, 200), 9));
            lineSeries.DataPoints.Add(new CategoricalDataPoint(rand.Next(1, 200), 14));
           
            this.radChartView1.Series.Add(barSeries); 
            this.radChartView1.Series.Add(lineSeries);

I hope this information helps. If you need any further assistance please don't hesitate to contact me.

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik