The present foreign exchange system exists from the 1970-
ies after the collapse of Bretton Woods system. There were
various attempts to predict the future exchange rate by the
academia. On the other hand, there is no agreement on the
classification of the models used for predicting the exchange
rates: some researchers classify them to technical, fundamental
and alternative models [34], others include a fourth class
which covers efficient market hypothesis models [7].
Technical models predict the future exchange rate based on the
previous fluctuations of the same exchange rate (Neely, 1997),
while fundamental models determine exchange rate by
calculations based on macroeconomic variables. Alternative
class covers other non-conventional models, efficient market
hypothesis models assume that the fluctuations cannot be
predicted.