Supply is measure of how much of particular commodity is available at any one time. As the supply of a currency increases, The currecny become less valualbe.Conversely. as the supply of a currency decreases, the currency becomes more valuable.
One the other side of the economic equation,we find demand.Demand is the measure of how much of a particular commodity people want at any one time. Demand for a currency has the opposite effect on the value of a currency than does supply.
As a result demand for a currency increases, the currency becomes more valuable . Convesely, as the demand for a currency decreases. the currency becomes less valuable.