"When it comes to sentiment indicators, one of my favorites is insider buying," says Mike Burnick, editor of Global Market Investor.

The advisor is intrigued by insider buying in the financial sector -- particularly among regional banking stocks. He explains, "The insiders are buying with both hands. Now's the time to go long." Here, he looks at the KBW Regional Bank Index ETF (ASE: KRE).

"U.S. corporate insiders are now buying more of their own shares than they're selling for the first time since 1995. Nearly 2,000 insiders at NYSE listed companies are snapping up shares - while total buys beat out sells by 1.44 times.

"There are many reasons to sell, but there's really only one reason to open your wallet and buy stock... you think it's dirt-cheap and likely headed much higher in price.

"This insider buying is taking place all across corporate America, but it's especially significant in the beaten-down banking sector. Stock buying by insiders at banks, consumer lenders and insurers in the S&P 500 index jumped recently to the highest level in 12 years.