Demand and supply are one factor that affect price of any coin in the market and and btc value do affect the price too , so the chart does tell about the situation in the market with the price reaction which give how people react to the market it buying or selling which tells about the price.
I think that the reasons why price is falling are very different and not always they are rational and can be understood. In my mind it is better to try to orient yourself on minimizing of possible consequences than on trying to predict them.