Hi Maria,
I have just done this successfully in SAP B1 V9 PL02, the format is as follows:
Date | Currency | Value |
Date | Currency | Value |
2010.01.01 | USD | 1.1111 |
2010.01.02 | USD | 1.2222 |
2010.01.03 | USD | 1.3333 |
2010.01.04 | USD | 1.4444 |
2010.01.05 | USD | 1.5555 |
2010.01.06 | USD | 1.1111 |
etc...
Enjoy!