Hi Artem,

I logged this as a feature request on your behalf and sent it directly to our product management team.  Our product team chooses new feature requests for development based on popular feedback from our customer base.  Infragistics continues to monitor application development for all of our products, so as trends appear in requested features, we can plan accordingly.

We value your input, and our philosophy is to enhance our toolset based on customer feedback.  If your feature is chosen for development, you will be notified at that time.  Your reference number for this feature request is FR13920.

Let me know if you have any questions on this matter.

I'm sorry, that positioning isn't supported currently. You could make a feature request. Or one way to achieve this would be to add a line series which has y values that are half the y values of the column series, and hide the stroke of the like series by setting stroke to transparant. I believe we added a PointSeries in 11.2 which acheives the same effect.