Who ever said that the way a market moves is similar to how a druken man stubbles down a street, is not a very optimistic person. To make a statement like that is sort of like just plain, giving up. There is a reason for everything. To say that a movement in price is completely random is very unfounded. Even the drunken man would have a reason for suddenly stumbling to the right or left. Maybe he lost his balance. Maybe he tripped on a rock. He probably was just leaning against the mail box vomiting. Those are all very good reasons for his "movement."

Example: Crude Oil, regular trading hours (i.e. open out cry)
A trading ring is composed or different players. Local: trading for his own interest. Broker: trades for customers and possibly his own interest. Are we to say none of those players have reasons? Would it be too bold to say that the "druken man" theory was just disproved in that last sentence? probably, so i will continue. Many things in nature are most easily reduced to a sort of law of averages. every group of dissimilar objects (people, food,bricks, whoknowsanythings) takes on an overall "persona" which is composed of each of those objects. One object may oversahaddow each other objects, but the other, lesser objects, are still part of the whole and ultimately influence it. A 5 part mens choir would not be the same with out the lowly baritone. A market is no different. Each person involved some how makes up the market place, from the trader to the oil rig worker, to Betty who is picking up her son from soccer practice in Hoboken, NJ. To some, this concept might be trivial. But it is essential in understanding and disecting a marketplace. This is no small task mind you.
The next step is to take a step back and understand the placement of the marketplace, as any being (Individual) is always equal to f(B,E) (i.e. and individual is a function of Behavior and Environment). Not until next time though.