do trend lines "work"?
Brooks and Wade, among others, all say they do. My opinion is that they give information with which i can make rigorous trading decisions.
when you have two pivots -which is a high or low
that is confirmed-then you can draw a trend line and extend it.
if the market does not touch it you lose nothing.
if market touches it then you know that is significant area.
if not why the hell would the market come to it.
if it comes close and does not touch it then you know that the move fizzled out/lost momentum and that it may be a reversal or correction ,which is a minor reversal.
this is information that is important.
because then you can check if the move was near to finishing-two legs or there would be one more [ second] leg.
the trend line is a key level but you need a price action confirmation and signal because markets can always blast through any level ,no matter how significant.
draw a few lines on any chart and see what trades may be generated at those levels.
i did that below. it was pretty illuminating and surprising at the wealth generated by these simple lines . use PA to enter.