if you buy a stock at 80, expecting that the price will go to 130; it doesn't mean that the price can not got further down to 70 or 60 or even 40. And if the price further goes down below your purchase price, it doesn't mean that you were wrong in your buying decision at 80. It simply means that you need to hold the stock patiently and wait for you 130 target.
Stock trading works like this. Stick with your plan. No one can consistently buy at bottom and sell at top. We are here to make money, not to become a hero.