Just整理了一份foreign exchange trading notes，發現自己對currency symbols的理解還是有點混亂的，especially是日圓符號這塊。

Actually, currency symbols are just visual quick recognition tools, seeing €就知道是Euro，看到£就是Pound，省去了一堆文字說明。The most practical are those commonly used symbols, like US dollar ($), Euro (€), Pound (£), which you see every day. But there's a pitfall here: the $ symbol is actually used by more than 30 countries, US dollar is US$, Canadian dollar is C$, Australian dollar is A$, mixing them up can lead to errors.

The Yen symbol (¥) is similar; both Japan and China use ¥, but one is Japanese Yen (JPY), the other is Chinese Renminbi (CNY). The way to distinguish is by adding the currency code in front, writing it as JPY¥100 or CNY¥100 for clarity.

If you frequently trade forex, knowing how to quickly input these symbols will save you a lot of trouble. On Mac, Euro is Shift+Option+2, Pound is Option+3; on Windows, Euro is Alt+E, US dollar is Shift+4. The Yen symbol on Mac is Option+Y.

The most easily confused symbol is ฿, which in forex represents Thai Baht, but in crypto circles, it stands for Bitcoin. You need to look at the context to tell.

Forex currency pairs are basically the exchange rate between two currencies, for example, EUR/USD is the Euro to US dollar rate. The first is called the base currency, the second is the quote currency. When trading, you rely on this rate to decide whether to buy or sell. Have you also been confused by these symbols?