Thes is what I tried before (and it worked). I created a module that connects to Yahoo Finance and gets the exchange rate for the argentinian peso. You can do it for your currency. Then I created an automated action that calls this function, and updates the currency exchange rate every five minutes.

Hi Gustavo, can you please post for us the code of the automated action that calls this function, and updates the currency exchange rate every five minutes. i will be very grateful Regards

Just visit v6apps.openerp.com and find with 'auto update currency', there is a number of modules for the purpose. Untested by me in v7.0.