The price finding process in a globalized free market is a very complex matter. Many parameters are involved and when looking at it, it is like a fascinating dynamic picture where all components change colour and place at any time randomly. Even the most sophisticated analytical instruments cannot predict market movements correctly at all times.
Profits and losses are equally distributed in this trading system and all market participants fight against each other not to lose their money.
Even though market movements in the future are unpredictable in general, the rewards of making an educated guess can be exceptionally high.
In a sellers market prices go down and an ordinary investment funds manager is in trouble. A futures trader can make profits in such a market situation, too.
In a buyers market the resultant of the sum of all market forces is positiv and prices are driven up. When such a trend prevails money is made with little effort.