Reticule is a line highlighting graph point nearest to the mouse cursor.
+For reticule to be visible, the chart needs to:
+1. Have ReticuleMode to value other that rmNone;
+2. Have at least one series implementing GetNearestPoint interface +(by default it is implemented by line, bar and area series);
+3. Have UseReticule +property of that series set to true.
+To ensure full visualization of the extreme points of the chart, it is usually a good idea +to set the default zoom value so that the default extent is slightly greater +than the extent of chart data.
+This can be done by either setting ExpandPercentage property, +which increases the extent value relatively, setting the extent +manually, or setting absolute margins.
+