Candlesticks vs Renko Charts
Candlesticks draw one bar per time interval, so every bar covers the same span of clock. Renko charts draw a brick only when price moves a set distance, which deletes the time axis and with it any sense of how fast a move happened.
The ordinary chart and the one that throws away the clock. Both plot the same market. One tells you what happened in each period; the other tells you only how far price travelled.
What each one is
A candlestick is one bar per time interval. It carries four prices — the open, the high, the low and the close — and every bar covers the same span of clock. Candlesticks covers how to read one.
A renko brick is one unit of movement. It prints only when price has travelled a chosen distance, so a quiet stretch produces nothing at all. Renko charts covers it.
The underlying data is identical. Renko is built from the same series; it simply discards everything that does not amount to a full brick.
Where they differ
What the horizontal axis means. On one chart it is time. On the other it is nothing in particular — just the order in which bricks happened to print.
Whether speed survives. A move that took an hour and one that took a month produce the same bricks. On the ordinary chart those look completely different, and the difference is usually the point.
How much detail each bar carries. A candle reports four prices and the relationship between them. A brick reports a direction and a fixed size, so the wick information is gone.
Whether there is a parameter. Candlesticks have an interval, which you choose but which corresponds to real time. Renko has a brick size, which is arbitrary and changes the chart completely.
Where they agree
Both come from the same data. Neither adds information; one of them removes a great deal, which is exactly what makes it easier to look at.
Both show trend clearly enough. A sustained move is obvious on either, and the argument between them is almost never about whether a trend is visible.
Both cost a round trip when traded — about 2% of the median bar range of 0.493 on this site’s shared series — and the chart type does nothing to that figure.
And neither supplies a stop. The ninetieth percentile bar range here is 1.101 and the largest single bar was 2.338, which is what any stop has to survive on either presentation.
Which one to use
Read candlesticks as the primary chart. It is the presentation your orders fill against, it reports four prices per bar, and it is the only one that tells you how long anything took.
Use renko as a secondary view when a quiet market is drowning your chart. Compressing a fortnight of nothing into two bricks is a legitimate reason to open it.
Use renko when your rules genuinely have no time component. If nothing in your method refers to a session, a close or a release, deleting the axis costs you nothing you were using.
And when anything in your method is scheduled, read candlesticks. A data release, an open, a close — none of them exist on a chart with no clock.
Why the missing clock matters
Because speed is information. A market travelling a long way quickly and one drifting the same distance over weeks are in different states, and only one of these charts distinguishes them.
And because the brick size is chosen, usually by appearance. People settle on the size that makes the past look cleanest, which is fitting a parameter to a chart you have already seen.
Running the two together
Keep the ordinary chart as the one you place orders from. Every level, every stop and every target comes off it, because that is the series your fills happen against and the only one carrying the four prices per bar.
Open the brick chart when the ordinary one is unreadable. A long quiet stretch on a low interval produces hundreds of bars containing nothing, and compressing them is a real reason to switch view.
Match the brick size to something you already measure. Tying it to typical bar range rather than choosing it by eye at least gives the number a reason to be what it is, instead of being the value that made last month look tidy.
And write down which chart a rule was tested on. A method developed on bricks and run on candles is not the same method, and the trade count is the first place that shows up.
The original data
Of the 24,971 unique videos in research/search-study-corpus.jsonl, 1 compares the two directly in
the title, at 667 views. Separately, candlesticks appear in 521 titles at a median of 5,236 across 371
channels, and renko in 72 at a median of 5,347 across 41. The counts come from site/rank_compare.py
and site/corpus_count.py.
521 videos on the ordinary chart across 371 channels against 72 on the brick chart across 41. Seven times the coverage and almost the same median views per video — the specialist presentation holds its audience per upload while being made by a tenth as many people.
The answer to the question on that chart is that the chart cannot tell you. Six bricks is six bricks whether it took an hour or a quarter — and if that distinction matters to your method, you are reading the wrong presentation.
When it fails
The failure is backtesting on bricks and trading candles, and the trade counts do not match. A renko chart hides every move smaller than one brick, so a rule tested on it never sees the shakeouts that would have hit a stop in real time. The historical record looks orderly. Run the same rules against the ordinary series and the entries fill at different prices, several trades that never appeared on the brick chart now exist, and the expectation the test produced was measured on a market that was not the one being traded.
The second failure is choosing a brick size by appearance. That is fitting.
A third is using renko for anything scheduled. There is no clock on it.
A fourth is reading a brick as a price level. It is a distance travelled.
A fifth is expecting the wick information. Bricks do not carry it.
And a sixth is switching charts after a losing run. The record becomes unreadable.
Related
Candlesticks covers the ordinary chart and its four prices. Renko charts covers the fixed-distance presentation. And heikin ashi is the smoothed chart that keeps its time axis.
Speed is the information that disappears. A move that took three weeks and a move that took an hour print identical bricks, and those are not the same event — one is a market grinding somewhere, the other is a market panicking, and the chart that deletes the difference cannot tell you which you are in.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.