The central conundrum to every trader is the question…..are the markets random or not The reality however is that the market is a random walk much of the time punctuated with periods of non-random directed price behaviour. The market exhibits behaviour characterised by fat tails. What this means in statistical terms is that markets carry more risk than what normal distributions characterised by random Brownian motion imply.
Accepting that the market is efficient most of the time does two things to your trading psychology. It forces you away from even caring about a single trade to one of simply caring about the next few thousand trades and ensures for your long term survival that you must seriously reduce your return expectations, leverage appetite and focus on risk management.