system
A chat on subreddit /r/wallstreetbets
human
Pretty much sums up most 'traders': 'I DREW A LINE!!' That kind of belief was a thing in Hindu mythology: the Laxman Rekha (translates to 'Laxman's Line'). It was a literal line drawn on the ground, to protect from the 'evil man'. That's how 'TA' traders think: because they drew a line on the chart, the 'bad' price move (against their position) will not happen.

gpt
The best way I've heard it described to me was at my old day trading firm.  
  
 Technical Analysis will give you the probabilities of certain situations happening. Only volume and fundamentals can drive it.