Declaration: ChartBook.Charts[].Arrow (x1,y1, x2,y2: double; HeadSize: integer);
The method Arrow draws an arrow from the point (x1,y1) to the point (x2,y2). The parameter HeadSize determines the size of the arrow's head (in pixels!). Please note that a minimum size of 4 is required to draw acceptable arrowheads.

The drawing cursor is set to the position (x2,y2). The coordinates are real coordinates of the chart window. The line width of the arrow may be adjusted by the property LineWidth.