On Tuesday, Certara received an upgrade to its Relative Strength (RS) Rating, from 69 to 77.

When looking for the best stocks to buy and watch, one factor to watch closely is relative price strength.

This exclusive rating from Investor's Business Daily identifies price performance with a 1 (worst) to 99 (best) score. The score shows how a stock's price behavior over the trailing 52 weeks holds up against all the other stocks in our database.

Decades of market research reveals that the best-performing stocks often have an RS Rating of at least 80 in the early stages of their moves. See if Certara can continue to show renewed price strength and clear that threshold.

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Certara is building a cup with handle with a 39.90 buy point. See if it can clear the breakout price in volume at least 40% higher than normal.

The company showed 33% earnings growth in its most recent report, while sales growth came in at 15%.

The company earns the No. 7 rank among its peers in the Computer Software-Medical industry group. Inovalon and Optimizerx are also among the group's highest-rated stocks.