For the past few days it seems Magento's default currency rate updater has not been working. 
As you can see, after I click import, most of the currency rates show 1:1 which is obviously not right. We are on Magento CE 1.9.2.1.
Magento – Currency Rate not importing correctly from Webservicex
currencymagento-1.9
Best Answer
The issue, as others have pointed out, is that the WebserviceX is now returning a -1 for all currency conversions. Until this is fixed I suggest you use another exchange API.
I suggest Fixer.io.
I have coded a module which will allow you to easily switch between the two.
https://github.com/philwinkle/Philwinkle_Fixerio