Ok this may or may not help with this explanation to go along with the lines...but I found this article awhile back of Tim Morge's on price flow...he had this method of taking the last pivots made and creating a channel with them...by drawing a line across two and then transferring the line to the latest pivot above or below.
He had limitations to create the lines and when to stop using them...I can't remember his exact rules.
I pretty much took it and use it on the teaching of Babson's Action Reaction...Babson's theory was from Newton's scientific law of For every action there is an equal and opposite reaction. Instead of just using the latest pivots I use the previous pivots also...working my way up or down the last swing.
Spike