SEBASS,
you can't beat them..so be them
let's say you sell yeast to breadmakers(you have the ability to set the prices thru supply and demand)-you buy the yeast from yeast makers(weak kneed short termers, etc..) and sell them to the breadmakers(solid longs) for a profit---you just found out that bread will make you live forever(gtel)--the breadmakers don't know this yet..and niether do the yeast makers--to make the most money(make a killing)...you want to drive the price of bread down to make the guys owning the yeast dump at whatever price(thinking they are going to take a loss because bread is a loser(not going to be any demand))---now do this day in and day out(lol)
remember that both yeast makers and breadmakers stand to make a huge profit knowing that demand for bread will increase(people wanting to live forever )--and you are in the middle of this
the trick is...you don't have that much time to do it..and you don't want to be obvious which equals a quick walk down, thinking good news--now just reverse it for the bad news
what's important is that you are never quite sure till the end of the day(lol)---hope that helped..good luck!
sinc,
bill