This is correct. And that is axiomatic for any professional player.Quote from trickshot:
..its obviously impossible to manipulate it for any extended period of time.
Manipulation is an emotional word for kids to use.There could be reasons why a price is being supported with buying power (for a time) or a ceiling level at which a price is being sold (for a time). Any amateur (non-professional) should know he is out of the loop in these matters.