Pembina Pipeline Corp (NYSE:PBA) was in 8 hedge funds' portfolio at the end of March. PBA has experienced an increase in enthusiasm from smart money in recent months.
I'm of the opinion that all investors should have some energy fueling their portfolios. How much energy you have is up to you, though a decent rule of thumb is to at least mirror the S&P 500.
At the moment, there are a multitude of metrics market participants can use to watch Mr. Market. A pair of the most innovative are hedge fund and insider trading movement.