Chart types explained: line, OHLC bar, candlestick and area charts

A price chart can be drawn in several ways, and the choice changes what you notice. A line chart shows a clean path of closing prices and nothing else. A bar chart and a candlestick chart show the full range of every session: where it opened, how high and low it went, and where it closed. An area chart is a line chart with the space beneath it filled in, which is easy to read at a glance but adds no information.

This guide draws the same 60 sessions of Apple (AAPL) four ways, explains how each chart is built, shows a day where the chart type changes the story, and ends with a guide to picking one. Every chart type here is available in the Finabase chart toolbar.

The four prices behind every chart

Every bar on a chart summarizes one period: a minute, a day, a week or a month. For that period the data feed records four prices:

• Open: the first trade of the period.
• High: the highest trade.
• Low: the lowest trade.
• Close: the last trade. For US stocks, the daily close is the official closing price set in the closing auction at 4:00 p.m. ET.

Volume, the number of shares traded, is usually drawn in a separate pane underneath. Every chart type below is a different way of drawing those four numbers.

Line charts

A line chart connects one value per period, almost always the close. It is the oldest and simplest chart, and it is the default on many apps, including the Finabase chart.

What it shows well. The overall path. In the top panel, AAPL's climb from $312.41 on August 6 to $348.91 on October 29, 2026 (+11.7%) is clear without any distraction. Because it draws one point per period, a line chart also stays readable over decades of data and when several symbols are compared on one chart.

What it hides. Everything that happened between closes. On September 22, 2026, AAPL traded as high as $345.34, about 1.9% above the previous close, then gave back nearly all of it and closed at $339.75, up just 0.2%. On the line chart that is a dull day. On the candlestick chart it is a tall upper shadow: buyers pushed the price up and sellers pushed it back. Many traders read that kind of rejection as information.

OHLC bar charts

An OHLC bar draws the high-to-low range as a vertical line, with a small tick to the left at the open and a tick to the right at the close. It is the classic Western chart that Edwards and Magee used in 1948, and many professional chartists still prefer it.

What it shows well. The full range of every period in a compact form. On a dense chart, say a year of daily data, bars stay thin and the eye follows the highs and lows easily. Gaps, where one bar's range does not overlap the previous one, stand out. In this window AAPL gapped down on August 10 and September 29, 2026.

What it hides. Nothing, but the open-to-close relationship takes a moment to read because both ticks are small. That is the main reason candlesticks became more popular.

Candlestick charts

A candlestick draws the same four prices with a thick body between the open and the close and thin lines, called shadows or wicks, out to the high and the low. A candle is usually green or hollow when it closes above its open and red or filled when it closes below. The technique comes from Japanese rice markets and was introduced to Western traders by Steve Nison in 1991.

The diagram shows two days from April 2025. On April 9, AAPL opened at $171.95, hit $200.61 and closed at $198.85, a 15.3% gain on the day a 90-day pause on most new tariffs was announced. The candle is almost all body with almost no lower shadow: the session opened near its low and closed near its high. On April 4 it opened at $193.89, traded between $187.34 and $199.88, and closed at $188.38, down 7.3%. The body is red, and the long upper shadow shows an early rally that failed.

What candles show well. Who won the session. A long body means a decisive move. A tiny body with long shadows means indecision: on October 26, 2026, AAPL opened at $343.92 and closed at $343.91 after a $6.06 range, a near-perfect Doji candlestick: meaning, exact rules and what the data shows. Candles are also the basis of candlestick patterns such as the Hammer candlestick pattern: meaning, rules and reliability and the Engulfing candlestick pattern: bullish and bearish rules and data pattern.

What they hide. Nothing, but they can dominate the eye. A big red candle looks alarming even when it closed higher than the day before, as 9 of the 60 sessions above did. Read the body as "open to close", not as "today's change".

Area charts

An area chart is a line chart with the area below the line shaded. It contains exactly the same data as a line chart.

What it shows well. The overall level and shape, at a glance. That is why area charts are common on summary screens, portfolio values and small "sparkline" charts.

What it hides. Everything a line chart hides, plus one trap: the shading invites you to compare the filled area, which only means something if the axis starts at zero. On a chart scaled from $300 to $350, a small move fills a lot of space.

Comparing the four

Other chart styles exist. Hollow candles combine both color rules in one candle. Heikin-Ashi candles: formula, worked example and how to read them candles average each bar with the previous one to smooth the trend. Renko, point-and-figure and Kagi charts drop the time axis entirely and draw a new box only when the price moves a set amount. They are useful for filtering noise but cannot show volume or the passage of time, and they are not part of the Finabase chart.

How to choose a chart type

• Learning to read charts? Start with candlesticks on a daily chart. They show the most at a glance and match most educational material, including this library.
• Looking at many years? Switch to a line chart and turn on a log scale. Thousands of candles become unreadable slivers.
• Comparing two or more symbols? Use a line chart. Candles for several symbols on one chart are illegible.
• Doing classic pattern and level work? Bars or candles, whichever you find calmer. Many chartists use bars on dense charts and candles when they zoom in.
• Following a trend and want less noise? Try Heikin-Ashi candles: formula, worked example and how to read them, but remember it no longer shows real prices.

Whatever you choose, keep the same type and color rules long enough that your eye learns them. Switching styles every day makes the same market look different every day.

A worked check: what each chart says about one week

Take the five sessions from September 14 to September 18, 2026. The closes were $333.08, $331.34, $332.41, $337.00 and $336.13, a gain of 1.2% on the week from the previous Friday's $332.27. A line chart shows a small, choppy week that edged higher.

The candles show more. Three of the five candles were red: September 14, 16 and 18. Yet on September 14 and 16 AAPL closed higher than the day before. On both days it opened above the previous close and sold off into the bell. September 17 told the opposite story: the low of $330.18 was below the previous close, the high of $338.34 was the best price of the week, and the candle closed green near the top of its range. A line chart records none of this. Whether opening strong and fading means anything is a separate question, which How to read candlestick charts: a guide with real data takes up, but on a line chart you cannot even ask it.

How Finabase draws charts

• Chart types. The chart tab of any symbol, such as AAPL, has a chart-type menu with Line, Candles, OHLC, Heikin-Ashi and Bars. Line is the default, drawn with an area fill that the Appearance menu can switch off. Bars draws each close as a column from the bottom of the chart.
• Colors. Candles are colored by their own open and close. OHLC bars and the volume bars are colored by the close versus the previous close.
• Volume and appearance. The toolbar turns the volume pane on and off. The Appearance menu controls the area fill and its up/down coloring, toggles a 10-period volume average, and can merge two to eight periods into one bar.
• Saved per range. Signed in, your chart type is saved for each range, so you can keep candles on 3-month charts and a line on the maximum range. The same saved settings are used by the Stock Master apps.
• Fast first view. Before the interactive chart loads, the page shows a static closing-price chart with volume, so the price is visible immediately.

Frequently asked questions

Which is better, a candlestick chart or a bar chart?

Neither carries more information; both show open, high, low and close. Candles make the open-to-close move easier to see and are needed for candlestick patterns. Bars stay cleaner on dense, long charts. Pick the one you read faster and stick with it.

Why does my line chart look different from the candlestick chart?

A line chart connects only the closes. Intraday highs and lows, gaps between sessions and long shadows do not appear, so moves look smaller and smoother. In the AAPL sample above, the average daily range was about twice the average close-to-close change.

Why is a candle red when the stock was up for the day?

Candle color compares the close with that candle's own open, not with the previous close. If a stock gaps up at the open and then drifts lower but still finishes above yesterday's close, the candle is red while the daily change is positive.

What do the thin lines on a candlestick mean?

They are the shadows, or wicks. The upper shadow runs from the top of the body to the session high, and the lower shadow from the bottom of the body to the session low. A long shadow shows that the price traveled far in that direction during the session but was pushed back before the close.

Summary

Line, OHLC bar, candlestick and area charts draw the same prices with different emphasis. A line or area chart shows only the close: clean for long histories and comparisons, but blind to the session's range. OHLC bars and candlesticks show all four prices: bars stay compact on dense charts, while candles make each session's open-to-close battle obvious and support candlestick patterns. Color rules differ by type, so read a candle's color as open-to-close, not as the day's change. Choose the type that fits the question, then keep it long enough for your eye to learn it.