I read that both in forex/futures when you enter an order, if you are in the trade winning 50$, another trader is losing 50$. Is there always this pairing of your orders being done?
Also if for example you buy corn futures 1 contract, and you are paired up with another trader who is selling, and you start winning, and the other trader just closes his position but you stay in the trade, potentially winning even more, then whose loss is my gain?