Targets are areas - no one can say with certainty that a stock will reach a target - it's an estimation based on how I read the chart. If a stock starts to show signs of weakness, take your profit and run. You can always buy back if you need to, but it's best to take profit and wait for the next buying opportunity (as a swing trader).
This stock has already reached the initial target ($123) I set on April 29th. The rest is gravy for me, if it hits the revised target of $129, great! If it starts to show signs of weakness, I'll take some off and eventually sell my remaining 2/3 position.
NO stock goes up forever, typically when a stock get's this far 'stretched' or this far over bought, it will retrace. Watch for it and make sure you don't lose those profits.