How to make Exchange Rate Dyanamic

Cna anybody tell me how to make Excahnge rate Dyanamic according to given financial year. I have Base Currency "EURO”  always and Currency may be anything then how to make thiis Conversion Rate Dynamic    
1 answers

I don't know exactly what you mean, but you could connect a Conversion Rate to a Financial Year. If you select a financial year you could then retrieve the conversion rate that is connected to that year and calculate with that.