My favorite time frame:

 
  • 24% (8)
  • 18% (6)
  • 27% (9)
  • 9% (3)
  • 6% (2)
  • 6% (2)
  • 9% (3)
Total voters: 33
 

H1 I believe is the most powerful one.

 
D1 to get the general trend, then H4 to confirm for the day you trade, then H1 to secure a good entry point and M15 to start the trading.. :)