Technical & Chart Analysis
Dow Theory
The foundational set of principles, drawn from Charles Dow's editorials, that underpins most modern trend-based technical analysis.
What Dow Theory means
Dow Theory was assembled from Charles Dow's Wall Street Journal editorials after his death and is usually stated as six tenets. The averages discount everything, meaning known information is already in price. The market has three trend degrees: a primary trend lasting months to years, a secondary reaction against it, and minor day-to-day fluctuation. Primary trends move through phases of accumulation, public participation and distribution. The averages must confirm one another. Volume should confirm the trend. A trend is assumed to remain in force until a clear reversal signal appears.
The practical inheritance is enormous: the definition of an uptrend as a sequence of higher highs and higher lows, the habit of treating a broken swing low as a trend change, and the general presumption in favour of continuation all descend from Dow. Its limitations are equally clear. Signals are lagging by construction, since confirmation only arrives well after a turn, the averages-confirmation tenet was designed for industrial and rail indices and transfers awkwardly to currencies, and reliable volume is unavailable in decentralised spot FX.
Worked example
If EUR/USD makes a higher high at 1.0940 and a higher low at 1.0820, Dow Theory treats the primary trend as up until price closes below 1.0820 and then fails to reclaim it, which would mark the first structural reversal signal.
Related terms
- TrendA sustained directional bias in price, conventionally defined by a sequence of higher highs and higher lows, or the reverse.
- TrendlineA straight line drawn along successive swing lows or highs to visualise the slope and boundary of a trend.
- VolumeA measure of trading activity - genuine contracts traded on an exchange, but only tick counts on a retail forex platform.
- Technical AnalysisThe study of historical price and volume data, usually on charts, to form expectations about future price movement.
- Elliott Wave TheoryA framework describing market movement as five-wave impulses in the trend direction followed by three-wave corrections against it.
Frequently asked questions
What does Dow Theory mean in forex trading?
The foundational set of principles, drawn from Charles Dow's editorials, that underpins most modern trend-based technical analysis.
How does Dow Theory work in practice?
The practical inheritance is enormous: the definition of an uptrend as a sequence of higher highs and higher lows, the habit of treating a broken swing low as a trend change, and the general presumption in favour of continuation all descend from Dow. Its limitations are equally clear. Signals are lagging by construction, since confirmation only arrives well after a turn, the averages-confirmation tenet was designed for industrial and rail indices and transfers awkwardly to currencies, and reliable volume is unavailable in decentralised spot FX.
What is an example of Dow Theory?
If EUR/USD makes a higher high at 1.0940 and a higher low at 1.0820, Dow Theory treats the primary trend as up until price closes below 1.0820 and then fails to reclaim it, which would mark the first structural reversal signal.
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