Hello Sulada,

You can utilize markerTemplate within the series option when instantiating the igDataChart and draw to the CanvasContext2D object returned by renderInfo.context in the render function. Here’s a link to the API with further details:
http://help.infragistics.com/jQuery/2015.2/ui.igDataChart#options:series.markerTemplate

Given that the label is only text, here’s a link on how to write text to a canvas:
https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Drawing_text

You can create a composite chart by creating a series for every bar chart you need and placing them along the same axes. Here’s an example on how to do so:
http://www.igniteui.com/data-chart/composite-chart