Though as to the decision of buying and selling now, it's somehow difficult, because most of my fun are divided by two, so when it rise little, i normally wish to sell, but at the same time wish to hold, but I don't want to loose all my money, so it's somehow difficult for me.
There is no need to complicate your mind in such matters, as long as your capital has not been lost, then you can decide to sell it temporarily and at another time you can buy it again for profit if the opportunity arises.