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 Motley Fool Rule Breakers pick Ancestry.com (Nasdaq: ACOM) are back to life today, up by as much as 13% after Barron's published a bullish article about the stock over the weekend.

So what: The article was titled "Tech's Top 10" and highlighted Ancestry.com as one of the picks made by a handful of fund managers and a research analyst. It cites an 18-month price target of $44, which would represent an upside of 91% from Friday's close of $23.

Now what: Crosslink portfolio manager Mike Stark sees the recent weakness as a buying opportunity since the stock has pulled back substantially from its all-time high of $45.79 set earlier this year, according to Yahoo! Finance. Stark describes Ancestry.com as the dominant online company for family-tree research, and he sees revenue increasing annually by 30%, as a new user interface makes the site easier to use. His earning-per-share estimate for 2012 sits at $2, higher than the consensus of $1.50, and emphasizes that the company's revenue per subscriber is greater than four times the cost of retaining them.

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