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Creating Variables for Currency Translation
Types 
When you create a currency translation type you can use a variable for the exchange rate, target currency or time reference.
You have assigned the technical Content InfoObjects Exchange Rate Type (0RTYPE), Currency Key (0CURRENCY) and Date (0DATE) to an InfoArea so that these InfoObjects can be used as InfoProviders.
...
1. Open the Query Designer.
2.
Create a new
query for the Exchange Rate Type (0RTYPE), Currency Key (0CURRENCY) or Date (0DATE) InfoObject, depending on which variable you
require. For more information, see
Defining New
Queries.
3.
In the
context menu of the InfoObject, choose New
Variable. The variables wizard appears. Also see
Defining Variables
with the Variables Wizard .
4. Enter a variable name and a description for the variable.
5. Choose the required processing type in the Processing by field. If you choose User Entry/ Default Value, the system requests that you enter the currency in a dialog box in the query.
6. Choose Continue. The Details screen appears. Here you decide how you want the entry to be displayed.
7. Choose Continue to assign a default value for the variable.
8. Choose Continue to get a summary of the properties of the variables.
9. Choose Exit. The variable is saved.
10. Leave the Query Designer.
The variable can be used in the currency translation type.