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Deflation is that the overall decrease normally indicator of an economy. Deflation causes decrease within the price of products and services which increases exports and increases the combination demand. Exchange rate is that the rate at which domestic currency is exchanged with foreign currency. rate of exchange provides the relative price of fine in terms of domestic and foreign currency. charge per unit is extremely volatile, and it affects the economy's foreign trade. Exchange rate is calculated as:

$\text{Exchange Rate}\left(e^t\right)=\frac{\text{Foreign pricelevel}\left({\mathrm{P}}_t\right)}{\text{DomesticPricelevel}\left({\mathrm{P}}_{\mathrm{d}}\right)}$

In the diagram, X axis shows the number of dollar assets.

Y axis represents expected rate of euro and dollar.

The figure shows how the worth of rate falls because the charge per unit and expected return on dollar assets falls.

Depreciation of currency means the decrease within the value of domestic currency relative to foreign currency. Depreciation of currency makes domestic goods cheaper relative to the foreign goods. Appreciation of currency implies that the rise within the value of domestic currency relative to foreign currency. Appreciation of currency makes foreign goods cheaper relative to the domestic goods.