There are a number of strong charts out there, especially with Wednesday's late market rally providing momentum.  Here are four, in particular, to watch.

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MAT

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Mattel (MAT) - Get Report

Mattel continued to rally on Wednesday after releasing earnings on Tuesday, up another $1.30 to $31.76 on 17 million shares. It blew past my first target, reaching my second target at $32.20 intraday. There's resistance up in that area. This stock has now risen more than $8, or 33%, from an intraday low of $23.85 on January 20. Target is $34-to-$34.50 next, but the stock may need to back and fill and consolidate first.

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ROVI

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Rovi (ROVI)

Rovi is a multimedia software company and continues to act well, rising steadily in a six-week up-channel after gapping up in late December. On Wednesday it gained another 77 cents, or 4.1%, to $19.53 on one million shares on no news. The stock looks like it wants to test and take out recent highs around $19.75. Beyond that, targets are $22.50 and $25.

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VHC

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VirnetX (VHC) - Get Report

VirnetX, which exploded in mid-January and consolidated, exploded again on Wednesday, up $1.10, or nearly 30%, to $4.79 on 4.1 million shares. The move came on an expected patent infringement win against Apple, which was announced after hours. Breaking out of the bull wedge, the stock was hovering near $9 afterhours. Through that, and next targets are $11 and then $12.50.

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XON

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Intrexon (XON) - Get Report

Intrexon is one of our favorite biotechs. It had a big reversal bar last month after a huge 5-month decline. It is now in a distinct up-channel and butting up against lateral resistance at around $33, where it has stalled for five days. If it gets through that resistance, watch for $38-to-$39 next.

See Harry’s video chart analysis on these stocks.

This article is commentary by an independent contributor, separate from TheStreet's regular news coverage.