SENTIMENT analysis aka the HERD's temperature is a very important part of my Daily chart Dow Jones Short call. This type of analysis however, is only "corroborative", PRICE being the sole, ultimate arbiter.
Some basics about the HERD's herding instinct and the enormous force on the lion aka lone warrior who shuns the HERD collective ..... (these extracts are from Bobby's work, albeit modified by me, which later formed the basis for my own work on the subject)
The discomfort of being alone in one's convictions and of just thinking of taking action apart from the HERD is so great that it alone can trigger autonomic activity such as sweating, twitching, muscle tightening, hair standing on end, flushing and deep fear and nausea.
The lion knows from experience that anyone who shares a prevailing majority of opinion on any subject, particularly one that is intensely attended by emotions of the limbic system (such as politics, religion, wealth, sex) is treated with the repect due his obvious intelligence and morality (these are HERD standards burned into the brain) .
One who utters an opposing opinion is immediately punished by a chorus of depecating smiles, cackles, mooing, snorting, nipping, farting, or outright hostility. It may sound funny, but if one is not used to verbal viciousness or rejection by the group, they are painful experiences, and most people cannot abide either.
This is why, in financial markets, when the best time to buy or sell is at hand, even the person who thinks he should take action experiences a strong psychological pressure to refrain from doing so. He thinks, if only half consciously, "when my neighbor or friend or advisor thinks its a good idea, then I'll do it too. If I do it now, and I'm wrong, they will all call me a dope, and I'll be the only dope. I'll be singled out for ridicule, which is not only agonizing but dangerous"
Therefore pressure from, and influence by, peers, then, is at least one reason why most people cannot bring themselves to change from a bullish to bearish orientation or vice versa if to do so would go against the ideas of their associates and contacts. It also explains why a market or other social trend can continue for a long time and why financial valuations can become so extreme as to appear outrageous to those who believe that people ought to base their decisions upon some calculable fundamental value.