Quote from academic:
Example: Our "indicator" tells us that the crowd is over-optimistic about stocks. Then the S&P rallies 10%. Were they really "over"-optimistic if they were right about the market direction?
Quote from runningman:
Go to your local bank- ask to see the financial advisor. Ask him how many clients called him that month to redeem mutual funds. When this number is high, you buy. When his clients are calling to add to their investments, you sell. Pretty simple indicator.