I am a new comer and not much experienced on BTC. The chart seems to me very difficult to understand. Please help me.
It's easy to understand: it's bullshit
What are you talking about? Notice the question mark after 3x Decrease? Its a speculation that perhaps for the year 2014 that bitcoin will not have increased.
If I draw 3 lines and write "x2847 increase?", that would still be bullshit. Even with the question mark.