Send a request to get your trade volume, return the response.

def tradevolume(self):
        """Send a request to get your trade volume, return the response."""
        request = '/v1/tradevolume'
        url = self.base_url + request
        params = {
            'request': request,
            'nonce': self.get_nonce()
        }

        return requests.post(url, headers=self.prepare(params))