An indicator is a tool in the hands of a technical analyst, it indicates something, now that something depends on what you are looking for, there is no such thing as the best indicator as such, focus your energies towards understanding yourself, what are your goals, what is your time frame, your capital, plan in utmost detail towards achieving that goal, learn all you can put your hands on this subject, test things, you will discard indicators which work best for others but not for you, not because the indicator is useless, but because your goals are different than his...thus you can chose your best indicator/system/money management and risk mgmt.
All the best.