This is why historical charts are so compelling, because when you look at something that has already taken place, it is always going to seem deterministic. On a price chart the way things unfolded are right there for all to see. The price level went from a to b to c in what looks like a logical set of steps that we can then try to explain and theorise with the benefit of hindsight. Surely the price drop at b occurred because such and such piece of news was released at roughly the same time. And the spike at c, well that's probably because so and so came out in the media with a positive statement that brought confidence back to the market.