Context: Multi-currency is enabled. Contract management enabled. Multi-price level is enabled. My customer's main currency is USD. My item selling price is 700 Euro. Currency and Exchangerate field are available on estimate. What I expected: I add my item in transaction line and price is automatically converted from Euro to USD. What happened: Item is added and liste Rate/Amount fields are blank. Any hint ?

You need to put pricing on the Item. There is a subtab to set price for each currency. AFAIK conversion on the fly is not automated but I guess would be possible with a line level script.

Seems odd since we thus have to update those pricing every week for all items because of the latest exchange rate.