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Yes, you can hide the indicator or line elements of RadTrackBar. Please refer to the following code snippet:
In attachments you can find the image which demonstrates you the result of code snippet. I also added a sample project.
In case that is not what you want to achieve, I would kindly ask you to send me a more detailed explanation. Any additional details like screenshots or sketches would also be helpful.
Let me know if I can assist you further.
.radTrackBar1.LabelStyle = Telerik.WinControls.UI.TrackBarLabelStyle.TopLeft;
.radTrackBar1.TickStyle = Telerik.WinControls.Enumerations.TickStyles.TopLeft;
TrackBarIndicatorElement element = (TrackBarIndicatorElement)
element.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
TrackBarLineElement lineElement = (TrackBarLineElement)
lineElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
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