Start by trading synthetically ( i.e. on paper with fantasy funds ).  Stay honest; commit for at least a month or a quarter.  See how you do and reevaluate subsequently.
Read books on technical trading; lists of the classics are everywhere.
Identify others who trade and see what they do ( or rather, what they say they will do and how successful or not their decisions are ).  Trust predictions, not retrospectives.
Even still, the markets are small enough and there are enough anonymous whales out there that big moves can happen on the whim of an individual; there's no way around that.