Sadly, there's no such thing as an ultimate buy signal when it comes to investing in stocks. Identifying companies with the wind at their back takes time, patience, and a good dose of due diligence.

There is, however, an easy way to increase your odds of finding the stocks that will beat the market. At Motley Fool CAPS, the Fool's investing community of more than 135,000 members, we've found that our "five-star portfolio" is up 15.31% between January 2007 and April 2009, compared with a loss of 40.6% for the S&P 500.

To fully capture the upside potential of those five-star stocks, it makes sense to identify them just as soon as they achieve five-star status. Fortunately, our CAPS screener now makes it possible to do this. Below, for example, is a list of companies that have been upgraded to five-star status from four stars just yesterday. These stock ideas are only a starting point, of course. Be sure to join us on CAPS to dig in even further.

Company

All-Stars Saying Outperform

Ares Capital (NASDAQ:ARCC)

254 of 264

RPM International (NYSE:RPM)

279 of 296

Pain Therapeutics (NASDAQ:PTIE)

187 of 203

Koninklijke Philips Electronics NV (ADR) (NYSE:PHG)

439 of 465

Atlantic Tele-Network (NASDAQ:ATNI)

196 of 203

ITT (NYSE:ITT)

295 of 312

Data from Motley Fool CAPS, Aug. 14, 2009.

Come and join us on CAPS, absolutely free, to learn more about these and countless other interesting stock ideas.