What is Dow Theory? The Origin of Chart Analysis
Introduction
There are countless methods and indicators in the world of trading. However, no matter how complex chart analysis may be, it ultimately boils down to one thing: reading the flow of the market. The first concept that theoretically captured this market flow, or trend, is "Dow Theory." Why do many traders not know this theory before learning indicators? The answer is simple: it is plain. But that is precisely why, once you understand it, you can use it for a lifetime.
What is Dow Theory? — Charles Dow's Market View
Dow Theory was built by a man named Charles Dow, who was active in the United States at the end of the 19th century. He was the founder of The Wall Street Journal and the creator of the Dow Jones Industrial Average.
After he passed away, the theory was organized by his colleagues, such as Samuel Nelson and William Hamilton, and established as "Dow Theory."
In other words, Dow Theory is not a single book, but a culmination of observations, articles, and interpretations. Nevertheless, it has remained valid in markets around the world for over 100 years.
The Six Basic Principles of Dow Theory
1. The Averages Discount Everything
This is the idea that every factor affecting the market—interest rates, economic policies, wars, natural disasters, etc.—is already reflected in the price. In short, looking at the price alone is sufficient, and this is the first pillar supporting the validity of technical analysis.
2. There Are Three Types of Trends
Long-term trend: 1 year to several years (the big picture)
Medium-term trend: several weeks to several months (the main trend)
Short-term trend: several days to several weeks (includes noise)
In Dow Theory, it is believed that these trends occur simultaneously like a nested structure. Traders get confused because it is ambiguous which trend they are currently looking at.
3. Trends Are Composed of Three Phases
Accumulation phase: Investors with information begin to buy (price does not move)
Public participation phase: Price begins to move, and many investors enter (rapid rise/fall)
Distribution phase: Movement slows down, and the trend heads toward its end
The phase where the most profit is made in trading is the "public participation phase," and many people fail by trying to trade the "accumulation" or the "top." Just by being aware of these three phases, you can reduce unnecessary entries.
4. Trends Persist Until Clear Reversal Signals Appear
Temporary reversals or corrections are not "trend reversals."
A trend continues until the sequence of highs and lows is broken. This concept forms the foundation of "buy the dip" and "sell the rally" strategies.
5. Volume Must Confirm the Trend
In the stock market, volume is used to determine whether a trend is genuine.
Volume increases during an uptrend → Strong buying
Volume decreases during a downtrend → Possibility of a correction
While volume is limited in FX, it is still used today for stocks and cryptocurrencies.
6. Trends should be confirmed by multiple indicators
Charles Dow placed great importance on both the 'Dow Jones Industrial Average' and the 'Transportation Average' moving in the same direction. This remains relevant today; for example, accuracy can be improved by observing the correlation between the USD/JPY pair, the Dollar Index, and other currency pairs. Furthermore, consistency across different timeframes (multi-timeframe analysis) is also rooted in this concept.
Definition of trends and conditions for reversal in Dow Theory
A trend is defined by the 'positional relationship between highs and lows'.
Uptrend: A state where highs and lows are rising.
Downtrend: A state where highs and lows are falling.
When this pattern breaks, it is judged as a 'trend reversal'.
For example:
During an uptrend → If the price breaks below the most recent swing low, the uptrend ends.
During a downtrend → If the price breaks above the most recent swing high, the downtrend ends.
These are the 'conditions for trend reversal'.
The essence of Dow Theory is to judge based on the structure of the waves, not on a single candlestick.
Common misconceptions and points of caution
A new high does not necessarily mean an uptrend (it is insufficient if the lows are not also rising).
A bullish candle does not mean a reversal to an uptrend (the trend continues if the wave structure has not broken).
Even if you judge based on the position of SMAs or EMAs, it is counterproductive to forget the definition of a trend.
The correct approach is not 'buy because the price went up,' but 'buy because it is an uptrend'.
Conclusion
All chart analysis begins with an understanding of 'waves'.
No matter how advanced the analytical methods you learn, they are meaningless without a foundation.
Where are you right now?
Is the trend continuing?
Or are there already signs of a reversal?
By adopting this perspective, your trading will shift from speculation to an understanding of structure.
Disclaimer and Copyright Notice
This article is written for educational purposes and is not intended as investment advice.
Please conduct actual trading based on your own judgment and responsibility.
Unauthorized reproduction, citation, resale, or duplication is strictly prohibited.