Reading a price chart from one day to one year

Just Stock Quotes, 28 September 2026

Every stock page opens on a chart, and the chart has a row of buttons from one day to one year. Most people tap one and look at the shape. The shape is the point, but each range tells a different story and rewards a slightly different way of looking. This guide goes range by range.

One day

The one day chart is today's session, built from intraday prints, with a line at the previous close so you can see at a glance whether the stock is above or below where it ended yesterday.

Look for the open. If the line starts well above or below the close line, the stock gapped overnight on news, and the day's change is mostly that gap rather than the trading since. Look at the first half hour, which is the most volatile part of most sessions and often reverses. And look at the last hour, when the biggest volume of the day arrives and the close is decided. A stock that spent the day drifting down and then rallied into the close was bought by someone who wanted it at the end of the day, which is a different day from one that fell steadily.

One week and one month

These are the ranges for context on the day. A stock down three percent today after a ten percent run this week is pulling back; the same drop after a ten percent slide is continuing. The one month chart is also where you learn what a normal day looks like for a stock, which is the only way to know whether today was abnormal. Count the big moves. A stock with five three percent days in the month is a stock where three percent is Tuesday.

Three months to one year

Longer ranges are built from daily closes, and the intraday noise disappears. What is left is the trend, or the lack of one.

A trend is a series of higher highs and higher lows, or lower highs and lower lows. It is easiest to see by squinting: does the line go from bottom left to top right, top left to bottom right, or sideways? A sideways range has a top and a bottom the stock keeps bouncing between, and those levels are the ones people set alerts at.

The one year chart puts today in proportion. A stock down twenty percent from its high looks like a disaster on the one month chart and like a normal pullback in a stock that tripled on the one year chart. Always look at the longest range before deciding how you feel about the shortest.

Gaps

A gap is a jump in the line between one close and the next open, and it happens when news arrives while the market is shut: earnings after the bell, guidance before the open, a takeover over a weekend. On the longer charts gaps show as sudden steps. They matter because they tell you when the stock's story changed, and the news tab on the stock page usually has the headline that explains each one.

Volume

The chart shows price; the stock page shows today's volume. The two belong together. A move on heavy volume had a lot of participants and tends to stick. A move on light volume was a few people and tends to fade. When a stock breaks out of a range on the one year chart, the volume that day is the first thing to check.

Moving averages and the range

Below the chart, The Numbers section lists the 50 day and 200 day moving averages and the 52 week high and low. Those four numbers are the chart in shorthand: is the stock above or below its medium and long term averages, and where is it in its yearly range? The guide on moving averages and beta covers how to use them.

What a chart cannot do

A chart shows what the price did. It does not show why, and it does not show what happens next. People have been finding shapes in charts for a century and the shapes work about as often as they fail. Use the chart to understand the story so far, to know what a normal day looks like and to find the levels that matter. Use the news and the numbers for the why. And treat anyone who tells you a chart predicts the future with the same warmth you would give a weather forecast for next spring.