Your exactly the type of investor that B lunist talks about.  An investor that is made to sell when the stock goes down.  My advice is to think about what PTSC has going for it right now.

We know that there are quite a few companies that have licensed that should show in the next PTSC quarterly filing.  Included in this quarterly filing may be some or all of the settlement dollars from the lawsuit in E. Texas.  This should be the largest quarter profit in this companies history.  Many investors will be coming back into this in the April time period and the stock will rise probably double at least is my guess from where the SP is right now before the quarterly is released.  Where the SP goes from there will depend on what the quarterly shows.  If it's great it could go much higher, if its Ok maybe we will at least base higher.  If it's disappointing we will probably see the SP tumble even farther unless there is a large amount of new licenses for the next quarter to keep investors interested. 

I am no stock expert by any stretch but if you can wait until April that would be a better time to sell.

Good luck and all the best,

Steve