The foreign exchange market is the made up of 2 components. First the Spot rate. This is the exchange rate at the present time. The spot rate on FX changes every second and is constantly updating....
Currency rates fluctuate on a variety of factors. Ranging from the country's economic health to general investor sentiments. Also combine a factor of the bullish and bearish markets, and you have...
Yes, foreign exchange rates are 100% accurate all the time. In other countries, such as Philippines...they have this so called block market and you could get better rates.