draw permanent line on chart shift

 

Is there a way to place a permanent horizontal line at the chart shift mark which does not shift when the chart scrolls to the left? Please note.... I know how to draw horizontal lines. I am only looking for a method to put a permanent line on the chart which does not move. Applying a background line doesn't work, the line still moves as the chart scrolls. Is a permanent un-moveable line possible?

 
Sorry, I meant VERTICAL line. Durrrr!
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