Implement more validation and conversion

core/exchanges/oanda.py

@@ -21,7 +21,9 @@ class OANDAExchange(BaseExchange):
         return self.call(r)
 
     def get_supported_assets(self):
-        return False
+        r = accounts.AccountInstruments(accountID=self.account_id)
+        response = self.call(r)
+        return [x["name"] for x in response["itemlist"]]
 
     def get_balance(self):
         raise NotImplementedError
@@ -59,7 +61,6 @@ class OANDAExchange(BaseExchange):
         r = positions.OpenPositions(accountID=self.account_id)
         response = self.call(r)
 
-        print("Positions", response)
         for item in response["itemlist"]:
             item["account"] = self.account.name
             item["account_id"] = self.account.id