There are two type of analysis styles; the fundamental and the technical. The fundamental analysis focus on the economic, social and political aspect of a country while the technical analysis is reading and studying the charts.
The price of foreign exchange may vary at a particular moment, depending on the prospective buyer or seller. It is therefore easy to see that the way to get the best price is to get quotations from a number of sources at or as nearly at the same time as possible and take the best quotation.
The effect of depreciation on trade can also be achieved by a general lowering of the internal price level. A 20 per cent lowering of the general internal price level will have the same effect as a 20 per cent depreciation of the domestic currency.