Being continually lucky registered somewhere? (2,1,4)
I believe the answer is:
on a roll
This might be a double definition.
'being continually lucky' is the first definition.
(someone on a roll keeps having good luck)
'registered somewhere?' is the second definition.
'on a roll' can be an answer for 'registered' (I've seen this before). I'm not certain of the 'somewhere?' bit.
(Other definitions for on a roll that I've seen before include "Having long spell of good luck" , "name could be found here?" , "Where ham may be" , "keeps having repeated wins" , "How butter may be spread" .)