I think, TA just provide you some useful information that can help you in your trades. There are many factors that affects the success of your trades and you shouldn't solely rely on the data being provided by TA. We can take analysis we want, as long we understand and get profit it will be fine. if you sell when something is overbought or buy when its oversold, youre gonna miss alot of the tops of runups and get cut by the falling knife as it just becomes even more oversolid.