Just as an addition to the thread about getting markers to show at the bottom of a chart, I found that on stock charts where many different intervals were used (40-47 with QCOM, but 130-180 with RIMM), the 'bottom' of the chart is not the same, so to get the markers away from the bar, but still be seen, I used the following:
PlotShapes(Buy*shapeHollowDownArrow,colorAqua,0,H+H*.05,0); which sets the marker a certain percentage above the bar. Easy to modify for slightly below or whatever. Phil