everyone influences the market.
it's never lasting though.
you are talking about a big influence. same answer. noone has a lasting influence on the market but the market itself.
sure, when someone with big pockets hits the wrong button (it does happen.. is it really a mistake though ? hehe) this mistake will trigger a fade, then traders will turn around and ride the trend, then side money will join the trend.
that's the influence part.
since the market is a high pace pyramid scheme, when the inflows at the new price is exhausted, the move collapses.
actually that's when you should really look at what happens, because the real trend of the market will show its face then.
but I slip. the market is pyramid scheme with feedback loop. it constantly searches for where to go (new money getting in the pyramid, bear market is different though imo. it's just a burst of the previous pyramid).
the market will follow the path of least resistance.
when something influences it, temporarly that's the least resistance with new money coming in, or money flowing out fast. rest of the time, the market explores where the next path is, helped by floor traders exploring price levels up and down, blowing stops etc..
don't make it something engineered by a few who are manipulating the market for their own benefit. nobody owns a double auction market. we are all part of the big feedback loop.
just do your job, reading where the path of least resistance is or play temporary imbalances. I admit it's deceptive but it ain't rocket science.
tntneo