What’s a contrary indicator for you? (Ex. Jim Cramer. Sentiment index.)

In my past life, when I worked in equity research, my colleague was much more advanced than me in how to analyze companies from looking at the financial statements and creating a financial model.

I wasn't in his league.

But he had one major weakness.

He didn't always see the bigger picture.

So, when he chose a stock, it often went down. Great at analyzing the numbers but not at picking stocks.

What is a contrary indicator for you?

For some, if Jim Cramer likes a stock, they avoid it.

Or maybe there's some sentiment index where if investors are overly bullish, you feel the Market's overheating.

Or maybe you look at some other data or metric that tells you something about the Market or industry or stock.

So, what contrary indicator do you like?