Data sources
This tool provides you with a visual trend of the foreign exchange market. The rates come from different data sources, and are gathered at different hours. They give you a snapshot of the daily exchange rate to be used as a mere indicator of it.
The number of sources is voluntarily limited as any new source will add its own share of data integrity and overall accuracy issues. Once again, as the stress is put on the trend and not on the accuracy of the exchange rates, using as few sources as possible helps us keeping the data consistent.
Historical rates (between January, 1 2006 and October, 31 2008) are provided by the Federal Reserve Bank of New York at the noon buying rates for the following currencies: US Dollar (USD), Canadian Dollar (CAD), Euro (EUR), British Pound (GBP), Japanese Yen (JPY), Australian Dollar (AUD), Brazilian Real (BRL), Swiss Franc (CHF), Chinese Yuan (CNY), Danish Krone (DKK), Hong Kong Dollar (HKD), Indian Rupee (INR), Korean Won (KRW), Sri Lanka Rupee (LKR), Mexican Peso (MXN), Malaysian Ringgit (MYR), Norwegian Krone (NOK), New Zealand Dollar (NZD), Swedish Krona (SEK), Singapore Dollar (SGD), Thai Baht (THB), Taiwan Dollar (TWD), Venezuelan Bolivar Fuerte (VEF) from January, 1 2008, and South African Rand (ZAR).
Current rates (from November, 1 2008) are provided by WebserviceX.NET currency convertor for 147 currencies and 4 metals (gold, palladium, platinum, and silver). The rates are gathered every week day at 11:30pm EDT.