Flag Mark is a simple tool for marking points of significance on chart. For example, user can place Flag Marks at high/low price points of a trend:
Flag Mark has green color by default and fixed size. Options of changing Flag Mark's style characteristics are not available so far.
In Coordinates properties dialog you can set precisely the position of a Flag Mark's position on the price scale (by setting the price) and the time axis (by setting the bar number):
In visibility properties dialog you can switch displaying of a Flag Mark drawing on charts of different timeframes: