A trader who wants to use Andrews’ pitchfork tool should know median line studies, such as Dr. Alan Andrews’ mail-order  “Action-Reaction Course”.  The course was a reference to Newton’s 3rd law of motion, which is also known as the action-reaction law.  There are abundant related materials on the internet, I do not need to repeat them here. Instead, I am providing a list of links to some of them on the right side. The trader should go through these materials and have a basic understanding of them before using Wangfork in his/her trading.