European Currency Unit opportunity for foreign diversification without reliance on the currency of a single country. The ECU was conceived on 13 March 1979 as an internal accounting unit. It had the ISO 4217 currency code XEU. On 1 January 1999, the euro (with the code EUR and symbol €) replaced the ECU, at the value €1 = 1 ECU. Unlike the ECU, the euro is a real currency, although not all member states participate (for details on euro membership see Eurozone). Two of the countries in the ECU basket of currencies, UK and Denmark, did not join the eurozone, and a third,
Currency pair = Cable = GBP/USD. The currency pairs that do not involve USD are called "cross currency pairs", such as GBP/JPY. Pairs that involve the euro are often called "euro crosses", such as EUR/GBP. Currencies are traded in fixed contract sizes, specifically called lot sizes, or multiples thereof. The standard lot size is 100,000 units. Many retail trading firms also offer 10,000-unit (mini lot) trading accounts and a few even 1,000-unit (micro lot). The officially quoted rate is a spot price. In a trading market however, currencies are offered for sale at an offering price (the "ask price"), and traders looking