What is technical analysis?
- Technical analysis forecasts price from past price and volume data, not from the company's business.
- You read support, resistance, trend lines, moving averages, and chart patterns to spot short-term trading signals.
- It works partly because it is self-fulfilling: enough traders watching the same levels makes those levels real.
- The academic evidence is mixed, and patterns fail often, so treat technicals as a timing aid, not a value tool.
- Use fundamentals to pick what to own, then use technicals to time your entry on a pullback at support.
What is technical analysis?
Technical analysis is a method for forecasting a stock's price from its trading history, using price and volume data rather than the business behind it. You assume past moves repeat, and you read the market's own footprints and trends.
It is a different religion from fundamentals. The technician does not care what the company earns; they care that the chart shows support holding at $50 and volume confirming a breakout. The market's behavior is the whole data set.
What do technical analysts look at?
You start with price charts built from historical data. Trend lines show the general direction; support is a price level where buying has held, and resistance where selling has capped further rises. A break above resistance or below support signals a potential move.
Volume confirms the story. A breakout on heavy volume is more convincing than one on thin trading, because it shows real conviction behind the move, while weak volume suggests the move may soon be reversed.
Moving averages smooth price over a window to spot momentum shifts, and the MACD tracks the gap between two moving averages. Indicators like the relative strength index gauge overextension, and chart patterns like head and shoulders or double tops add context.
Candlestick charts, the oldest form, tell the same story in single bars of open, high, low, and close. A support level that breaks often becomes resistance, and a broken resistance becomes support, as the roles swap with the crowd that once defended them.
Sentiment indicators read the crowd itself. Put/call ratios, short interest, and advance/decline breadth show how bullish everyone already is, and investor surveys do the same. When sentiment is extreme, the contrarian read is that the move may be about to reverse.
Does technical analysis work?
It works to a degree, and partly because it is self-fulfilling. When enough traders watch the same support and resistance levels, their own buying and selling makes the patterns real. That is the honest verdict.
The academic evidence is mixed at best. Much of the apparent edge is noise, and patterns fail often, especially for long-term moves, where prices behave closer to a random walk over extended horizons.
Where technical analysis adds real value is short-term trading signals, timing entries and exits on a stock you already own for other reasons. You are not predicting the future; you are reading momentum.
What are the limits of technical analysis?
It says nothing about whether a company is good, only where the market has been. A chart pattern cannot tell you the business is bankrupting itself or winning a new market; that is fundamental analysis' job.
The efficient market hypothesis says past prices carry no usable edge, because the market already priced in every known fact. Technicals only pay off if investors repeat themselves, and the academic verdict is that the repeats are too small and too costly to bank on.
Patterns fail as often as they succeed, because markets are noisy. By the time a pattern is obvious, it has often played out. Random walk studies say past prices give little advantage once costs and slippage are counted, so the edge is thin and hard to keep.
How do you combine technical and fundamental analysis?
Use fundamentals to pick what to own, and technicals to decide when. A fundamentally strong stock bought on a pullback at a support level on rising volume is a common, sensible blend.
Many investors ignore technicals entirely and do fine, buying on a schedule and holding long term. If you use charts, treat them as a timing aid, not a value tool.
Their strength is reading momentum, not judging worth. That is the right role: technicals time the entry, fundamentals pick the stock, and blending the two is where these signals actually earn their keep.
Technical analysis can be top-down or bottom-up. Top-down scans indexes and sectors first to find strength, then drills into individual charts; bottom-up zooms straight into one stock's chart and reads its own levels.
Where did technical analysis come from?
Charles Dow, founding editor of The Wall Street Journal, laid the groundwork in the late 1800s by studying how prices moved in trends. Richard Schabacker later turned Dow's ideas into a discipline built on charts, while Japanese rice traders read candlestick patterns for centuries before either.
The method rests on three tenets. Every known fact is already inside the price. Prices move in trends until emotion breaks them. And history tends to repeat, because investors replay the same patterns of fear and greed, which is why technicians read the crowd, not the company's books.
The field grew through the twentieth century. Ralph Nelson Elliott mapped wave patterns, William Gann studied price and time, and Richard Wyckoff broke volume into distribution and accumulation. Edwards and Magee's Technical Analysis of Stock Trends became the discipline's bible in 1948.