Trend Confirmation · Classical · 1900s · Swing / Position
The original framework for reading trend direction from price action — not a single signal but a way of confirming a trend is real before trusting it. Charles Dow never wrote it down as a formal system; it was pieced together from his Wall Street Journal editorials after his death, and it still underpins most of what's now called ‘price action’ trading.
Dow argued a market is in a primary uptrend only while it keeps making higher highs and higher lows. Each pullback (a ‘secondary reaction’) is expected — the signal isn't the pullback itself, but whether the next low holds above the previous one. A failure to do that is the first warning the trend may be turning. Dow also cross-checked trends between related markets (famously, industrials and transports), on the idea that a genuine economic trend should show up in more than one place at once — though that cross-confirmation piece is rarely used in its original form today.
Price rallies off a low to an initial swing high — the first leg of a possible new trend, but on its own not yet confirmed.
Price pulls back. Dow called this a 'secondary reaction' — a normal corrective move against the primary trend, expected rather than alarming.
The pullback holds above the prior low. This is the actual signal Dow watched for: higher highs AND higher lows together, not just a rally.
Price pushes on to a new high, completing the sequence. The same pattern — swing high, higher low, new high — is what Dow Theory looks for on every leg that follows.
Illustrative example only — not real market data.
The chart above shows the pattern in miniature: a swing high, a pullback that holds above the prior low, and a push to a new high. Most modern ‘structure-based’ trading — marking higher-high/higher-low sequences to define trend direction — is Dow Theory by another name, whether or not the trader calls it that.