после регистрации на конкурс не пришли логин и пароль,при повторной попытке регистрации
ответ что я уже зарегистрирован в чем причина
If you don't get the email after you register for the contest, don't worry.
You can always view your contest credentials on your profile:
1. Log to Dukascopy Community.
2. Go to your profile page: https://www.dukascopy.com/fxcomm/profile/
3. Click on the "Show Login" link in the respective section of the "My Contests Accounts" portlet.
The same is happend to me! Solution is to reset your password and you should get post "Password Reset".