Some people follow a market strategy of being a contrarian. This means that if others are buying, then you will be selling and vice versa. I think this makes a lot of sense, at least in theory. The hard thing is not about the theory itself, but deciding when the theory is applicable. If you look at a snapshot of all the available market theory, they will work in particular situations but not in others, hence to a beginner who is bombarded by a thousand and one market strategy, he will only get more confused after reading all these.
I am saying all these because it seems like people are trying out new strategies almost like changing new clothes. Try a bit of value investing, try a bit of momentum trading, try a bit of this and a bit of that. I'm quite sure some of the advice for a particular ......