The first 2 levels require Higher Education degrees: most recommended (math, computer science).
Those that work for goldman, ubs, or others in level 1, last 1-2 years minimum an average before heading down to level 2 (higher bracket). From level 2, they'll stay there for an average 3-5 years minimum
Those begin trading in the ghettos level, will not make it. Those begin trading in the LEGIT lower bracket level, have a better chance of making it in the "profit making status" vs those that begin the ghettos level.