Thank you! And totally agree about brokers generally, biggest is worth! Fortunately, since 2011, we have an account with AMP futures, whom I delighted to discover is also the sponsor of this blog, and we had some minor issues and always resolved it. the truth is that we had not yet traded real volumes with them, but I hope the quality will be the same. Returning to UBS, we obviously contacted that many times and they keep providing wit their trading advises, where there is no any number from the exchange or clearinghouse. So at this point, the only exchange can help and give some directions, once exchanges are first to be interested to have volumes. Will try tomorrow to send details, as you suggested and will see what outcome will be.