I can't include High[period], with a period of more than 20 bars back, even though there are plenty of bars plotted on the screen. I check that there are enough bars plotted so that shouldn't be the problem.
DrawLine("trendline", false, 30, High[30], currhbar, High[currhbar], Color.Red, DashStyle.Dash,2);
Thanks in advance!
Kevin
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