there is no straight answer to the question you are asking. For starters you never now for sure. You can only try to determine the posibility's the technical chart gives you and combine those with fundamentals. And even there we see no straigth answer. You need some experience and a certain way of "thinking" to get to where you want to get. You need to combine charts, fundamentals and insight.

there is no easy way to learn this...there are no shortcuts. The best thing is practice, study and more practice.