If you have the patience, this is the link to the theory and practice. As you will discover it has evolved over a period of time, but page one explains the theory and how to trade.http://www.forexfactory.com/showthread. ... +trendline
Version 3.01 is the one that has been ported from MT4 to Marketscope. It gives good entry signals, the difficulty is getting the exit sorted out.
Worth following up in my modest opinion.