What is the Dow Theory? I was alerted to the fact that November 3 will be the Charles Dow’s 160th birthday.
Dow Theory can be summarized in the following six tenets:
1.The First Tenet is that
markets move in one of 3 trends: a.
Up Trends are defined as when successive rallies close at levels higher than those of previous rallies and lows occur at higher levels than previous lows.
b.
Down Trends are when the market makes successive lower lows and lower highs.
c.
Corrections are defined as a move where the market recedes in a direction opposite of a move sharply in one direction
before it continues in that original direction.
2. The Second Tenet is that
trends have 3 phases (a precursor of the theories of market life cycle and psychology described above):
a. The
Accumulation phase which is when “expert†traders actively take positions actually opposite the majority of people in the market.
Price does not change much during this phase as the “experts†are in the minority and so are not significant enough to move the market.
b. The
Public Participation Phase which is when the public at large catches on to what the “experts†know and begins to trade in the same direction.
Rapid price change can occur during this phase as everyone piles onto one side of a trade.
c. The
Excess Phase is when rampant speculation occurs and the “smart money†starts to exit their positions.
3.The Third Tenet is that the
markets discount all news so that
once a piece of news is released it is quickly reflected in prices. On this point Dow Theory is in line with the efficient market hypothesis.
4. The Fourth Tenet is that the
Industrials and Rails Averages must confirm each other; a sign that the market is going to change direction comes when two averages move in opposite directions.
5. The Fifth Tenet is that
trends are also confirmed by volume. There are many reasons why price may move on low volume, but when prices move on high volume there is a greater chance that the move is representative of the overall market’s view.
6. The Sixth Tenet is that
trends exist until definitive signals prove that they have ended.
What Dow was saying here is that there will be market moves which are against the primary trend but this does not mean that the trend is over and the market will normally resume its prior trend
http://www.yolohub.com/trading/what-is-the-dow-theory
It's all about "how much you made when you were right" & "how little you lost when you were wrong"