How to read a stock chart without fooling yourself

A chart shows what already happened. It does not show what happens next, no matter how convincing the shape looks. Read it for context, not prophecy.

What a candle is actually telling you

Each candle covers one slice of time — a day, an hour, a minute. The thick body spans where the price opened and closed; the thin wicks show the highest and lowest points it reached in between.

A long lower wick means sellers pushed the price down and buyers pushed it back. That is information about a fight, not a forecast of who wins next.

The timeframe changes the story

The same company can look like a disaster on a one-week chart and like a steady climb on a ten-year one. Neither is lying; they answer different questions.

Before you form an opinion, decide which question you are asking: what happened this week, or what has happened over the years?

Three ways charts trick beginners

First, patterns appear everywhere in random data — human eyes are built to find them. Second, a chart with no scale or dates can make a 2% move look dramatic. Third, price alone hides why something moved; earnings, interest rates and news do the actual moving.

The takeaway

Use charts for context and for checking your own memory. Use lessons, filings and reasoning for decisions.

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