like anything else its supply and demand , more buyers then sellers it goes up more sellers then buyers it goes down
but the real truth is they have a giant brass gerbal wheel with tits on the outside that move price
and on any given day either don bright or maverick 74 goes into the wheel and gets it started then the other jumps in and they start the wheel running up
pretty soon don tires out and falls inside the wheel and price starts bouncing around, this is when the market trades sideways, maverick gives don a hand and they get the wheel going in the same direction, a breakout, it goes up for awhile until maverick says something about bob bright , bob jumps on and starts running the wheel in the opposit direction, don joins in and the market thrusts down, maverick tries to tick it up a touch but don throws out the 100 million dollar account card and maverick can't hold up, the bright brothers start the wheel flying in the other direction and maverick is bouncing all over the wheel causing some up and down sideways action, the bright brothers slow the wheel down a little and maverick decides its smart to go their way and the wheel really takes off to the down side
bob jumps off at the bottom, don and maverick make nice and decide to go to dinner and the wheel starts back up