6.3.1.6 Exchange Rate Variable Type To define a Exchange Rate type of variable: Select the variable sub type as Exchange Rate in the Variable Sub Type drop-down menu. Select value from the Value Type drop-down menu. In the Currency Particulars section: Select a dimension from the Select list of values for the currency drop-down menu. Select a currency from the From Currency drop-down menu. Select a currency from the To Currency drop-down menu. Select a logical reference from the Logical Reference drop-down menu.