I can't grab currency rates when I try to do it through HM2. I get an error message saying "Error retrieving exchange rates." It wouldn't be all that bad, but whenever you try and fail to grab currency-rates, all currency-rates will automatically go down to "0" instead of keeping their old values. This causes ALL my graphs in HM2 to be unable to load.
My suggestions would be:
1. If you try to update your currency rates and they fail, the values of all currencies shouldn't drop to "0", but rather keep their old values.
2. Make a fix so that you can load the graphs even if you haven't got any proper currency rates (by giving all currencies a "1" value in comparison to the dollar for example).