Does anyone have a trick for being able to show the exchange rates in a CV?

Create dynamic accounts which pull the rates. If you have an FX calc you should have the syntax. The source currency you can base on the POV C#. I can post something here when I get by a computer.
Dim fxRateTypeName As String = api.FxRates.GetFxRateTypeForAssetLiability().Name 'Rate type for Balance Sheet accounts
Dim timeId As Integer = api.Pov.Time.MemberId 'Time period being processed
Dim sourceCurrencyId As Integer = api.Pov.Cons.MemberId 'POV currency
Dim destCurrencyId As Integer = api.Members.GetMemberId(Dimtype.Consolidation.Id, ""USD"")'USD
Dim closingRate As Decimal = api.FxRates.GetCalculatedFxRate(fxRateTypeName, timeId, sourceCurrencyId, destCurrencyId)
Return closingRate
Create a Dynamic Account, put that code in, and then whatever C# in the POV is it will return the associated Closing Rate to USD. I hardcoded the destination as USD in this example (because that's all I was required to show) but it could be made more dynamic for the destination currency if you have that need.