Quote from whitster:
you can define it any way you want.
but what it means is analysis of financial instruments based on price/volume action, or any derivative of same (indicators, trend lines, TRIN, tick, etc.)
iow, TA is the study of price. volume is just price repeated, so to speak.
the easiest way to think about it is, if it is not TA, then it is usually fundamental analysis. so, ask yourself - am i looking at price or a derivative of same, or am i looking at factors affecting price
if i am looking at management, earnings, if i am asking store managers how the product is moving off the shelves, if i am stopping by headquarters to see if the company employs a cute receptionist (buy the stock if they have a cute receptionist theory), that is obviously not TA.
if you are looking at price action - it's ta.
many don't want to admit what they do is TA, so they make up some special definition like the last poster.