NEW YORK ( TheStreet) -- Two weeks ago, I considered Hansen Medical. This week it's Hudson Technologies ( HDSN) as I survey the landscape looking for under $5 plays that have potential.

The thought with Hansen was that we could see the break of a long-term down trend line at any point here and that the risk to take a shot at that possibility was minor compared to the possible reward. A couple of weeks later, not much has changed there.

In Hudson, the trade is different. The company is increasing its revenues and margins, and the chart shows a wide trading range on a long-term view. In both companies, the downside is limited with the upside potential large.

Hudson is a distributor and declaimer of refrigerants. They also provide proprietary on-site decontamination services for large comfort and process cooling systems. To get a feel for this stock, take a look at the big picture -- the quarterly chart.

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