I had the same view on them till three things occured to me :
1. They must know a great deal more of TA than I do, to be there.
2. They have their own clients to take care of, thats where the real money lies, so he might just give a buy on a dud hoping his clients can 'exit' a bad position.
3. Sadly when you put someone on TV, call him 'The Great One', and ask him for a prophacy, he doesnt have the luxury of saying "how would i know what Nifty is going to do two weeks from now, cant you see how volatile it is", so he says something in those moments of uncertainty, hoping it comes true, thus are prophets made in the markets. A wrong call is well *shrug* its the markets, an outlandish call going right is the making of a legend.