All forex transactions include two currencies, because you are betting on the value of one currency against another. Think of EUR / USD, the best-selling currency pair in the world. EUR, the first currency in the pair, is the base, and USD, the second, is the counter. When you see the price indicated on your platform, this price is equal to the value of one euro in US dollars. You always see two prices, because one is the purchase price and the other is the sale. The difference between the two is in distribution. When you click buy or sell, you buy or sell the first currency in a pair.
Risk Disclosure: Trading in financial instruments and/or cryptocurrencies involves high risks including the risk of losing some, or all, of your investment amount, and may not be suitable for all investors. Prices of cryptocurrencies are extremely volatile and may be affected by external factors such as financial, regulatory or political events. Trading on margin increases the financial risks.
Since the market is made by each of the participating banks providing offers and bids for a particular currency, the market pricing mechanism is based on supply and demand. Because there are such large trade flows within the system, it is difficult for rogue traders to influence the price of a currency. This system helps create transparency in the market for investors with access to interbank dealing.