How foreign currencies are quoted and priced (MODUL 2-2)

Currency pairs are often quoted as bid-ask spreads. The first part of the quote is the amount of the quote currency you will receive in exchange for one unit of the base currency (the bid price). The second part of the quote is the amount of the quote currency you must spend for one unit of the base currency (the ask or offer price). For example, a EUR/USD spread of 1.2170/1.2178 means that you can sell one Euro for $1.2170 and buy one Euro for $1.2178. This spread could also be quoted as 1.2170/78.