Candlesticks vs Tick Charts
Michael Whitman
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Trading since 2017, full-time since 2020
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Published 2026-09-09
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Updated
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Reviewed
Time-based candlesticks close a bar when the clock says so, so a quiet lunch and a frantic open each get the same number of bars. A tick chart closes a bar after a set number of trades, so bars pile up when activity is high and thin out when it is low.
Every chart has to decide when a bar ends. Candlesticks let the clock decide; tick charts let the market’s activity decide. We do not have tick data, but SPY’s five-minute volume shows how differently the two rules would spread bars across a trading day.
What each one is
A time-based candlestick ends when its period ends. A five-minute bar closes every five minutes, busy or not, and every chart reader sees the same bars. Candlesticks covers how each one is read.
A tick chart ends a bar after a set number of trades. Five hundred trades, a thousand, whatever the setting says; the clock plays no part. Tick charts covers the setting and its effects.
A volume chart is the close cousin used here instead. Neither it nor a tick chart uses the clock. It ends a bar after a set number of shares. It is not the same thing, because the number of shares in each trade changes through the day, but it is the activity measure our data allows.
Where they differ
Who sets the bar’s length. On candlesticks, the clock; on tick or volume charts, the market instead, so the same setting gives short bars at the open and long ones at lunch.
Whether everyone sees the same bars. Five-minute candles line up across every platform, while a tick bar depends on the setting and on which feed counted the trades, so two traders can draw different charts of the same session.
What a quiet stretch looks like. A time chart fills it with small bars, whereas an activity chart prints few or none, which removes the clutter and also removes the sense of how long nothing happened.
What a bar count means. Ten candles is always fifty minutes on a five-minute chart, rather than a span set by trading. Ten activity bars can be a few minutes at the close or most of an afternoon.
Where the bars would go on SPY
Activity piles up at the edges of the day. Sizing each volume bar to SPY’s average five-minute volume across the 60 sessions, 471,819 shares, so that a whole day averages one bar per five minutes, the first five minutes of the day would print 4.70 bars and the next five 1.61.
The middle of the day thins out. The 12:00 slot would print 0.76 bars, 13:00 0.59 and 13:55, the quietest, 0.49. The final five-minute slot, where end-of-day orders gather, would print 7.62, which is 15.58 times the quietest slot.
So the chart spends its bars differently. The first half hour is a thirteenth of the clock but would hold 14.21% of the activity bars; the last half hour 21.63%. The two and a half hours from 11:30 to 14:00 are 38.46% of the clock and would hold 23.94%.
And whole days differ too. A five-minute chart prints 78 bars every session. Activity bars would have printed 49.0 on 2 September 2026 and 124.3 on 4 August, around a median of 75.9.
Which one to use: Candlesticks or Tick Charts?
Use time-based candles when anything in your method refers to the clock. Opening ranges, session closes, data releases and every bar other people are looking at all assume a time axis.
Use an activity chart when the midday stretch is drowning the moves you care about. On SPY the quietest slot would have printed half a bar while the open printed nearly five.
Use an activity chart only with a fixed setting and a fixed feed. Change either and the bars change.
And when you compare rules across the two, translate bar counts into time first. Ten bars at the close and ten bars after lunch are not the same amount of market.
One day in two kinds of bars: SPY, 4 August 2026
The candles. On 4 August 2026 the five-minute chart printed its usual 78 bars, one every five minutes from 09:30 to 16:00.
The activity bars. The same session traded enough shares to fill 124.3 bars of the average size, the most of the 60 sessions. On an activity chart that day would be more than half as long again as a normal one, with most of the extra bars bunched where trading was heaviest.
The quiet counterpart. On 2 September 2026 the session filled 49.0 bars. On a five-minute chart the two days take up the same width; on an activity chart one is two and a half times the other.
The original data
The sample. Five-minute SPY data from Yahoo Finance covering 60 regular sessions, 10 July through 2 October 2026, with no pre-market or after-hours bars. That is a small, recent sample from one instrument.
The stand-in. There is no tick-by-tick trade count in this file, so nothing here is a true tick chart. Instead each five-minute bar’s share volume is divided by a fixed unit, the average five-minute volume over every bar of the 60 sessions (471,819 shares), to give the number of equal-volume bars that slot would have printed, fractions included; across a session they average 78 bars, the same as the five-minute chart. A real tick chart counts trades, and shares per trade vary through the day, so its pattern would differ by an amount this file cannot measure. No trade count, tick count or trade-by-trade timing is measured anywhere on this page.
The files. Mean volume and bars for each of the 78 slots are in the SPY five-minute volume bars file.
When it fails
The failure is carrying a bar-count rule from one chart to the other, and changing the trade without noticing. A rule such as exit after five bars was tested on five-minute candles, where five bars is always twenty-five minutes. Moved to an activity chart, five bars at the close might be a few minutes and five bars after lunch might be an hour or more. The rule’s words are unchanged; the holding time, the stop distance and the trade count are not.
The second failure is assuming everyone sees your bars. Tick bars depend on the setting and the feed.
A third is reading volume bars as tick bars. They count different things.
A fourth is judging an activity chart on one season. Sixty sessions is a small sample.
And a fifth is forgetting what a quiet stretch looks like. An activity chart hides it.
Related
Candlesticks covers reading a time-based bar. Tick charts covers how the trade count is chosen. And price action covers reading the bars once they are drawn.
Count how many bars your chart prints at the open, at lunch and into the close before you trust a rule built on bar counts. A rule like three bars in a row means very different stretches of time on the two charts.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.