Small Indicator to visually see Nth Bar Close - NT8

Is there an easy way or some indicator to visually see the close of Nth Bar in a Chart in NT8 ? What I mean is, during live session I don't want to count the bars back manually every time in a chart. An indicator that 'highlights' the Close with a horizontal line of last 9th Bar or may be 10th Bar (only single bar) will be helpful. It should delete and repaint every time as new bars are created.

Example: If I select 8 Bars-Back, it shows a small red line on the close of that bar.