UGI had its Relative Strength (RS) Rating upgraded from 67 to 72 Thursday -- a welcome improvement, but still shy of the 80 or better score you look for.

When looking for the best stocks to buy and watch, be sure to pay attention to relative price strength.

IBD's proprietary RS Rating measures market leadership by showing how a stock's price movement over the last 52 weeks measures up against that of the other stocks in our database.

History reveals that the top-performing stocks tend to have an RS Rating north of 80 in the early stages of their moves. See if UGI can continue to show renewed price strength and hit that benchmark.

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UGI broke out earlier, but is now trading about 4% below the prior 48.30 entry from a flat base. If a stock you're tracking clears a buy point then falls 7% or more below the original entry price, it's considered a failed base. It's best to wait for the stock to form a new pattern and breakout. Also keep in mind that the latest consolidation is a later-stage base, and those involve more risk.

In terms of top and bottom line numbers, UGI has posted rising EPS growth over the last three quarters. Revenue gains have also moved higher over the same time frame.

The company holds the No. 1 rank among its peers in the Oil & Gas-Refining/Marketing industry group.