Intuition, yes. Experience, yes. You don't use TA blindly. You aren't in JBII for the TA.
You'll never see a statistician nor actuary who uses TA unless he's trying to sell you a book or something. They can predict the death rate on a population of 40,000 at Bristol-Myers Squibb with eerie accuracy using massive analysis of historical data, but the same computers fail to see any predictable pattern on stocks like JBII.
“People have always had this craving to have someone tell them the future. Long ago, kings would hire people to read sheep guts. There’s always been a market for people who pretend to know the future. Listening to today’s forecasters is just as crazy as when the king hired the guy to look at the sheep guts. It happens over and over and over.” ~~Charlie Munger
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