contraryindicator

noun
UK /ˈkɒntrəri ˈɪndɪkeɪtə/
US /ˈkɑːntreri ˈɪndɪkeɪtər/

A contrary indicator is a sign that shows the opposite of what most people expect.

When everyone was buying, the contrary indicator told her it was time to sell.


OTHER MEANINGS

2. A person or thing that tends to do the opposite of what is popular.

His taste in music is a contrary indicator of what will be trendy next year.

3. A market signal suggesting the crowd is wrong.

High excitement among investors can be a contrary indicator for the stock.

4. A clue that points away from the obvious conclusion.

The quiet street was a contrary indicator that the festival was nearby.