Andrews' Pitchfork is a line study consisting of
three parallel trendlines based on three points you select. This tool
was developed by Dr. Alan Andrews.
Interpretation
The interpretation of a pitchfork is based on normal
trendline support and resistance principles.
Example
The following chart of Xerox shows an Andrews'
Pitchfork.
The pitchfork was displayed by selecting the three
points shown. You can see how prices tended to "walk along" the
trendlines.
Calculation
The first trendline begins at the left-most point
selected (either a major peak or trough) and is drawn so it passes
directly between the two right-most points. This line is the "handle" of
the pitchfork. The second and third trendlines are then drawn beginning
at the two right-most points (a major peak and a major trough) and are
drawn parallel to the first line. These lines are the "tines" of the
pitchfork.