Well if I have my own good display of trend of bitcoin like ng the trading sites then I could easily know when to buy and sell. Visual representation of trend could easily hype me to do buy/sell. I buy once it goes down a bit then sells high once it reaches the price of bitcoin I want to sell.
What do you mean by ng,is there a site who gives some detailed charts or something like that,what i do is to follow the market and i am not investing in bitcoin anytime soon,i am just looking at alt coin market and scouting for good tokens to invest so that i will convert them to bitcoin at a later time.