Direct Answer
An OHLC bar chart shows each period as a single vertical bar spanning from the period's low to its high, with a short horizontal tick on the left side marking the open price and a short horizontal tick on the right side marking the close price. It conveys the same open, high, low, and close information as a candlestick chart, just with tick marks instead of a filled or hollow body.
Key Takeaways
- Each period is a single vertical bar from the low to the high, with a left-side tick marking the open and a right-side tick marking the close.
- An OHLC bar carries the exact same open, high, low, and close data as a candlestick, the difference is presentation, not information.
- Some traders find OHLC bars less visually noisy across many bars on screen at once, since there's no filled or hollow body to render.
- The tradeoff is that open/close direction is less immediately obvious at a glance than a candlestick's colored body.
- Named candlestick patterns (doji, engulfing, and similar) are defined around the body shape, so they're normally read on a candlestick chart rather than an OHLC bar chart.
What Is an OHLC Bar Chart?
An OHLC bar chart shows each period as a single vertical bar spanning from the period's low to its high, with a short horizontal tick on the left side marking the open price and a short horizontal tick on the right side marking the close price. It conveys the same open, high, low, and close information as a candlestick chart, just with tick marks instead of a filled or hollow body. Some traders find OHLC bars less visually noisy across many bars on screen at once, at the cost of open/close direction being less immediately obvious at a glance than a candlestick's body.
How an OHLC Bar Is Built
Every bar is drawn from the same four numbers as a candlestick: the open, high, low, and close for that period (a day, an hour, a five-minute interval, whatever the chart's timeframe is set to).
- The vertical line spans from the period's low (bottom) to its high (top). This is the full price range traded during the period.
- The left tick is a short horizontal mark on the left side of the vertical line, positioned at the open price.
- The right tick is a short horizontal mark on the right side of the vertical line, positioned at the close price.
Because there's no body to fill, an OHLC bar doesn't need a color convention to distinguish up periods from down periods the way a candlestick typically does, some platforms may add color as an optional visual aid, but the tick-mark structure itself works in a single color.
How to Read One: A Worked Example
Hypothetical example, for education only.
Say a stock trades through the following session: open $48.00, high $50.50, low $47.20, close $49.80.
On an OHLC bar chart, that period is drawn as one vertical line running from $47.20 at the bottom to $50.50 at the top. A short tick sticks out to the left at $48.00 (the open), and a short tick sticks out to the right at $49.80 (the close).
| Value | Price | Where it appears on the bar |
|---|---|---|
| High | $50.50 | Top of the vertical line |
| Open | $48.00 | Left tick |
| Close | $49.80 | Right tick |
| Low | $47.20 | Bottom of the vertical line |
Because the right tick ($49.80) sits higher on the bar than the left tick ($48.00), this period closed above where it opened. Reading that relationship takes a slightly closer look than it would on a candlestick chart, where the same period would be drawn as a filled or colored body running from $48.00 to $49.80, visually distinct at a glance without comparing tick heights.
OHLC Bars vs. Candlestick Charts
| Aspect | OHLC bar chart | Candlestick chart |
|---|---|---|
| Underlying data | Open, high, low, close | Open, high, low, close (identical) |
| Open/close marker | Left/right tick marks | Filled or hollow rectangular body |
| Direction at a glance | Requires comparing tick heights | Immediately visible via body color/fill |
| Visual density on screen | Some traders find it less cluttered across many bars | Bodies can look denser with many bars on screen |
| Named pattern compatibility | Underlying data present, but body-shape patterns aren't drawn | Native format for candlestick patterns (doji, engulfing, etc.) |
Neither format contains more information than the other, an OHLC bar and a candlestick built from the same open, high, low, and close values are, in substance, the same data point drawn two different ways. Choosing between them is largely a matter of personal preference and what a trader is using the chart for.
How Traders Use OHLC Bar Charts
Traders who favor OHLC bars generally do so for the same reasons they'd use any price chart, tracking the high-low range and the open/close relationship of each period, rather than for a signal unique to the bar format itself. A few commonly cited reasons for the preference:
- Reduced visual clutter at high bar counts. Some traders find a screen full of thin tick marks easier to scan than a screen full of filled bodies, particularly when several charts or a long lookback window are displayed at once. This is a stated preference, not a measured readability advantage.
- Range-focused reading. Because the vertical line is the most visually dominant element, OHLC bars can put more visual emphasis on the high-low range of each period relative to the open/close relationship.
- Familiarity from certain markets and platforms. Traders coming from charting environments that default to OHLC bars often carry the preference over when they switch platforms.
None of this makes OHLC bars a different analytical tool from a candlestick chart, the same trend lines, moving averages, and volume analysis apply on top of either format, and any signal read from the open/high/low/close values themselves is identical either way.
Limitations and Common Mistakes
- Direction is easy to misread quickly. Without a filled body, glancing at an OHLC bar without carefully comparing the left and right tick heights can lead to misreading whether a period closed up or down, especially on small chart panels or with many bars packed tightly together.
- Body-based candlestick patterns don't translate directly. Patterns like the doji or engulfing pattern are defined by the shape and relative size of the candlestick body and wicks. The same open/high/low/close values exist in an OHLC bar, but the visual framing those patterns rely on isn't drawn, so traders who use named candlestick patterns typically switch to a candlestick chart to spot them.
- Neither format adds information the other lacks. Switching from OHLC bars to candlesticks (or back) doesn't reveal new data, it's a presentation choice, not an analytical upgrade or downgrade.
- Like any single-period chart view, it says nothing about volume, liquidity, or order flow on its own, those need separate indicators or overlays.
Same Data, Different Reading Speed
Choosing between OHLC bars and candlesticks is a decision about how fast you need to read, not about what you get to see. Both encode the identical open, high, low and close. The candle body converts the open-to-close relationship into a shape and a colour, which the eye resolves instantly; the OHLC bar leaves it as two small ticks whose relative heights you have to compare. That is why bars feel calmer on a dense screen and why direction takes a fraction longer to register.
The practical cost shows up exactly where the benefit does. On a small panel packed with bars, the left and right ticks sit close together, and glancing rather than comparing is how a down period gets read as an up one. If you work at that density, the visual quiet you gained is partly paid for in misreads.
There is also a real workflow consequence for pattern traders. Named candlestick patterns are described in terms of body size and shape relative to the wicks, and an OHLC bar does not draw a body. The underlying values are all present, so the pattern exists; it simply is not rendered in the form the definitions assume, which is why most people switch charts to look for them.
Whatever you choose, hold onto the main point: neither format contains information the other lacks. Switching styles changes how quickly you see things and never changes what there is to see.
OHLC Bar Chart FAQs
What is an OHLC bar chart?
An OHLC bar chart shows each period as a single vertical bar spanning from the low to the high, with a short horizontal tick on the left marking the open and a short horizontal tick on the right marking the close. It conveys the same open, high, low, and close data as a candlestick chart, just drawn with tick marks instead of a body.
What is the difference between an OHLC bar chart and a candlestick chart?
Both plot the same open, high, low, and close values per period. A candlestick draws a filled or hollow rectangular body between the open and close, making up/down direction easy to spot at a glance. An OHLC bar uses left and right tick marks instead of a body, some traders find this less visually noisy across many bars on screen at once, at the cost of open/close direction being less immediately obvious.
How do you read an OHLC bar?
The top of the vertical bar is the period's high, the bottom is the low, the tick sticking out to the left is the open, and the tick sticking out to the right is the close. Comparing the left and right tick heights shows whether the period closed above or below where it opened.
Which is better, OHLC bars or candlesticks?
Neither is objectively better, both display identical underlying data. It's a matter of preference and screen density: candlestick bodies make individual up/down periods and body-based patterns easier to spot at a glance, while some traders prefer OHLC bars for a cleaner, less visually noisy look across many bars at once.
Can candlestick patterns be applied to OHLC bar charts?
Named candlestick patterns like the doji or engulfing pattern are defined in terms of the candlestick body and wicks, so they're normally read on a candlestick chart. The same open/high/low/close values are present in an OHLC bar, but the body-shape framing those patterns rely on is not drawn.
Why do some traders prefer OHLC bar charts?
Because OHLC bars are drawn with thin tick marks rather than filled bodies, some traders find a screen full of them less visually cluttered, particularly at higher bar counts or when several charts are displayed side by side. This is a stated preference among some traders, not a proven readability advantage.
What is an HLC bar and why does it drop the open?
An HLC bar shows the high, low and close but omits the opening tick on the left. The convention dates from periods and datasets where a reliable official open was not available, particularly for older series and for some over-the-counter instruments. Where the open is recorded, an HLC bar discards information for no benefit, so it survives mainly in historical charts and in a few data feeds.
How are OHLC bars coloured?
By one of two conventions: the close against the bar own open, or the close against the previous bar close. They disagree whenever a bar opens above the prior close and then falls, or the reverse, which is common. Neither is standard across platforms, and the setting is often buried. Two charts of the same data can therefore show different colour sequences without either being wrong.
Do OHLC bars stay legible at higher compression than candlesticks?
Generally yes. A bar is a thin vertical line with two short ticks, so bars can sit close together and remain individually distinguishable. Candle bodies have width and merge into a continuous block sooner as periods are compressed. This is a practical reason some analysts prefer bars for wide views, and it has nothing to do with the information content, which is identical.