United Natural Foods had its Relative Strength (RS) Rating upgraded from 90 to 93 Thursday.

When looking for the best stocks to buy and watch, keep a close on eye on relative price strength. This exclusive rating from Investor's Business Daily identifies price action with a 1 (worst) to 99 (best) score. The score shows how a stock's price behavior over the last 52 weeks compares to all the other stocks in our database.

History shows that the market's biggest winners tend to have an 80 or better RS Rating as they begin their biggest climbs.

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United Natural Foods is working on a consolidation with a 42.50 buy point. See if it can break out in volume at least 40% above average.

United Natural Foods reported negative growth for both the top and bottom lines last quarter. United Natural Foods is expected to release its next quarterly numbers on or around Sep. 28.

United Natural Foods holds the No. 3 rank among its peers in the Wholesale-Food industry group. G Willi Food International and Amcon Distributing are among the top 5 highly rated stocks within the group.