Trading usually means buying something at a low price and selling it at a higher one, so the difference between the buy and sell price is our profit. When this concept applies to trading currency pairs you can say that you take a long position. There is also another concept of “short sale” or when you take a short position. This is when you are able to sell something at a high price and buy it later at a lower price, so the profit here would be the difference between the selling price and the buying price.
