Central banks do not always achieve their objectives. The combined resources of the market can easily overwhelm any central bank. Several scenarios of this nature were seen in the 199293 ERM collapse, and in more recent times in Southeast Asia.

An exchange rate quotation is given by stating the number of units of a price currency that can be bought in terms of 1 unit currency (also called base currency). For example, in a quotation that says the EUR/USD exchange rate is 1.3 (USD per EUR), the price currency is USD and the unit currency is EUR.

One major advantage of technical analysis is that experienced analysts can follow many markets and market instruments, whereas the fundamental analyst needs to know a particular market intimately.