set 3 targets: short term, intermediate term and long term (assuming for stocks like this all price targets are way above your entry price and the stock has continuing promise). When you hit short term target at the right time carefully take your equity out, when you hit intermediate term take some additional out and ride the balance to your long term target. Depending on your assessment of the stock your long term position could be 60-70% of your position and for this stock that would be a fantastic outcome. I should have done this with GTAT but unfortunately didn't. Watch out for the taxman at the exits and remember the old portfolio strategy about exiting large positions and their possible impact on price especially if a lot of others are doing it at the same time. Also remember free advice is worth what it costs.