Look at this chart! Silver reversed exactly at the 0.764 Fibonacci level. It's not one of the main Fibonacci levels, though.
http://le-blog-de-reklats.over-blog.com/article-29976882.html This link is primarily about the trendline techniques of Alan Andrews (Andrews Pitchfork). I think it may answer some of your questions about trendlines and quite possibly enlighten and/or enhance your usage in general. This is NOT a suggestion to use any particular tool, method, or indicator.
Concentrate on this one, those are guys in the know, it's a shame the thread ended, but I guess all good things must come to an end. http://elitetrader.com/vb/showthread.php?s=&threadid=215130&perpage=6&pagenumber=1
Waiting for silver to figure out where it wants to go. Let's see what happens next! Think that recent bottom will hold? I haven't posted in this thread much cuz nothing has really been happening.