There are two key aspects of foreign exchange markets that any would-be trader needs to bear in mind.
The first is that they are definitely not for the faint-hearted. The second is that forex trading is a zero-sum game, in which every winner must be matched by a loser.
Imagine if equity markets worked that way. As shares in Ford edged up, for example, those in General Motors would have to fall by a corresponding amount. They don’t work like that, of course, and it is quite possible for all stocks to rise and fall at the same time.