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.
Send an Email to contest@dukascopy.com. It's the fastest way
The same is happend to me! Solution is to reset your password and you should get post "Password Reset".