Gann Fan

 
Gann Angles are drawn between a significant bottom and top (or vice versa) at various angles. Gann identified nine significant angles, with the 1 x 1 being the most important:

1 x 8 - 82.5 degrees
1 x 4 - 75 degrees
1 x 3 - 71.25 degrees
1 x 2 - 63.75 degrees
1 x 1 - 45 degrees
2 x 1 - 26.25 degrees
3 x 1 - 18.75 degrees
4 x 1 - 15 degrees
8 x 1 - 7 degrees

Note that in order for the rise/run values (e.g., 1 x 1, 1 x 8, etc) to match the actual angles (in degrees), the x- and y-axes must have equally spaced intervals. This means that one unit on the x-axis (i.e., hour, day, week, month, etc) must be the same distance as one unit on the y-axis. The easiest way to calibrate the chart is make sure that a 1 x 1 angle produces a 45 degree angle.

A sample Gann Fan is depicted in the following figure:

Gannfan2.gif (8615 bytes)

Because this is an interactive drawing feature, the user normally create the Gann fan by selecting the first extreme point and then dragging the mouse to the other extreme point. When the mouse is released, Chart FX FE will make all the necessary calculations and draw the Fan. Please note. it is not necessary that the user clicks on a specific data point as the Gann Fan will be calculated according to the axis scale and the position the mouse was released.