The specific operation method is to buy a certain currency, be bullish, sell a certain currency short and be bearish. When we talk about currency pairs, long or short operations are aimed at the currency to the left of the currency pair, that is, the base currency. For example, going long in America and Japan means that you buy dollars and sell yen at the same time. Similarly, shorting Europe and Japan means that you sell euros and buy yen at the same time.