If you think it through when you place lines against certain lows or tops they will at some stage produce a corresponding relationship because I suspect it all falls in line with Elliot Waves.
As you may have gathered your 'Resistence lines' work in the opposite set-up but I assume you already knew that.
While I understand the basic concept of EW, trying to work out where we are is really guess work for me unless I am looking at something like a 5 - 10 year chart. Clearly your 'Resistence lines and the Fan Principle do link with EW' and is a worthwhile tool and the most important part it is simple to use.