"Where two or more gather..." ...so...continuing from where I left off:
An online lower-cased buddy of mine here recently used the phrase
"circular reference." While he incorrectly said or implied that such a thing is not allowed in Excel (in fact, it is by special permission; but that's another tutorial), it does perfectly describe a part of these markets we trade.
You see, trend-lines, moving-averages, bollinger-bands, etc., and the like
work not because stocks themselves say in effect, if not in these exact words:
"Hey! I'd better reverse direction. I just hit the 200-day!" But instead because the
owners of those stocks etc. say those things.
Because everyone (or more precisely--a lot of folks) expects a bounce/reversal/etc., at least, on these key levels: elliott, bollinger, MA's, EMA's, Candles, etc.;
it happens! a lot of times.
If for that reason only, such (what are in effect) arbitrary constructs do indeed have value.
A
self-fullinging prophecy. A circular reference. A reduction in market entropy; and thus, an increase in market predictability.
usercuz