Quote Currency (in the Forex market) is the second currency in a forex pair. It is how much you need to spend for one unit of the standard currency. For example: in EUR/USD, the quote currency is a dollar, how many dollars do you need to buy one euro? This is often referred to as the Currency pair counter, as it plays a significant role in computing pricing and exchange rates.
It is used to establish the equivalent value between one currency and another and also to express profits or losses on a trade. Having an insight into quote currency is crucial for understanding Forex quotes, entering the trade correctly, and controlling the exposure to certain types of risk arising from potentially adverse exchange rate movements.