SimplyComp can handle multiple currencies for deals, Quotas and payments across varying permutations, so long as the required currencies are input to the table. 

From a calculation perspective, SimplyComp will always do the calculations in the system/business currency. This can be edited in the User preferences of any System Admin. SimplyComp will convert all deals into the system currency, perform calculations all in system currency and then convert out the final payment to the Users personal currency. 

To ensure Exchange Rates are fully enabled in the tool, 3 requirements must be met

1. Set User Personal Currency
2. Set Personal Currency in Payments
3. Ensure data has ISO Code Currency columns