Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Trina Solar Limited (NYSE:TSL) jumped nearly 12% Thursday after an analyst at Cowen lifted his long-term earnings forecast for the company.

So what: The move comes just two days after shares jumped 11% on Trina's better-than-expected fourth-quarter results. At the time, fellow Fool Travis Hoium noted Trina's superior balance sheet could afford it the ability to "build the next generation of solar capacity this year or next."

Citing both expected higher overall shipments and significant growth prospects in China, Cowen analyst Robert Stone increased his respective 2015 and 2016 earnings per share forecasts from $0.90 and $1.30 to $1.00 and $1.40. Stone also reiterated his outperform rating and $21 price target on Trina shares.

Now what: Stone is also far from the most optimistic analyst, considering average 2015 expectations call for earnings of $1.66 per share.

In any case, if one thing seems sure, it's that the solar industry appears to be finally enjoying a resurgence. If this turnaround continues to gain steam, and with shares of Trina Solar trading hands just above $18 per share, I think patient long-term investors still stand to reap significant rewards.

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Steve Symington has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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