Aroon Indicator: Time Since the High, Not Trend Strength
The Aroon indicator counts bars. Aroon-Up and Aroon-Down each report how much of the lookback window has elapsed since the most recent high and the most recent low, which is a different question from how strong the trend is. The formula, the honest 25-versus-14 default split, the three-step crossover read, the 30/70 bands, where the lines whipsaw, and a mechanic-by-mechanic contrast against ADX.
Aroon is two lines in a sub-pane, each bounded between 0 and 100, and almost everyone reads them as a trend-strength gauge because that is what a 0-to-100 oscillator looks like. They are not measuring strength. They are counting bars. Aroon-Up answers how much of the lookback window has gone by since the highest high in it, Aroon-Down does the same for the lowest low, and neither line has any term for how far price actually moved. Once that clicks, every odd behaviour the indicator has stops being odd: why it saturates at 100 and stays there, why it can jump on a bar where nothing happened, and why it is a genuine complement to ADX rather than a second opinion on the same question.
Quick Answer
The Aroon indicator is a two-line trend tool that measures how recently a lookback high or low occurred. Aroon-Up = ((Period - Periods Since Highest High) / Period) x 100 and Aroon-Down = ((Period - Periods Since Lowest Low) / Period) x 100, both scaled 0 to 100. A reading near 100 means a new extreme just printed; a reading near 0 means the extreme is as old as the window allows. It was developed by Tushar Chande in 1995, and the name comes from Sanskrit imagery for dawn. Above 70 is the conventional strong band and below 30 the weak band, with 50 as the window midpoint. The buy read is a three-step sequence: Aroon-Up crosses above Aroon-Down, the two then separate across 50, and Aroon-Up reaches toward 100 while Aroon-Down sits in the 0-30 zone. Defaults differ by platform, with 25 on the reference implementation and 14 on TradingView. It works in trends and whipsaws in ranges, so it is conventionally paired with ADX, a moving average, or a stochastic rather than traded alone.
Everything below is the detail that paragraph compresses: the elapsed-bar arithmetic worked out at both common settings so you can check it, why the time-based construction makes Aroon answer a different question from every momentum oscillator you already run, the honest state of the default-period disagreement, the three-step crossover read stated precisely, and the conditions where the lines produce confident signals about nothing at all.
What Is the Aroon Indicator?
Two lines, plotted in their own pane below price rather than on it. Aroon-Up tracks the recency of the highest high inside a fixed lookback window. Aroon-Down tracks the recency of the lowest low inside the same window. Each is bounded 0 to 100 and each moves independently of the other, which is why the tool is read as a pair rather than as a single level.
It was developed by Tushar Chande in 1995, and the attribution is uncontested across the reference sources. The name is Sanskrit, and the translations you will find differ slightly in wording while agreeing entirely in meaning. The StockCharts ChartSchool entry on Aroon renders it as "Dawn's Early Light"; other published guides render it as the first ray of the morning sun. Both describe sunrise, and Chande's stated reasoning is the same either way: the indicator is meant to reveal the beginning of a new trend the way dawn reveals a new day. There is no correct translation to pick here, so this post does not pick one.
One disambiguation before anything else, because the search results mix the two constantly. This post is about the two-line Aroon-Up and Aroon-Down indicator. The Aroon Oscillator is a separate, related study: Aroon-Up minus Aroon-Down, plotted as a single line ranging from -100 to +100 around a zero level, where positive means the high is more recent than the low and negative means the reverse. Same inputs, one line instead of two, and a zero crossing in place of the crossover. It is a different chart study with its own page on most platforms, and everything below refers to the two-line version unless it says otherwise.
What Is the Aroon Indicator Formula?
Aroon-Up = ((Period - Periods Since Highest High) / Period) x 100
Aroon-Down = ((Period - Periods Since Lowest Low) / Period) x 100
One input: the lookback period. Find the highest high in the last N bars, count how many bars ago it was, and convert that count into a percentage of the window that has not yet elapsed. Repeat for the lowest low. No closing price appears anywhere in either formula.
Work through it once and the whole indicator falls out. At a 25-period setting, if the highest high of the last 25 bars is the bar you are looking at, zero periods have passed, so Aroon-Up is ((25 - 0) / 25) x 100, which is 100. Five bars later with no new high, it is ((25 - 5) / 25) x 100, which is 80. Twenty bars later, 20. At 25 bars, zero, and the window is exhausted. That is the entire mechanism, and Fidelity's technical indicator guide entry for Aroon states the same two expressions independently if you want a second reference on the arithmetic before trusting mine.
The part worth internalising is the decay rate, because it is fixed and it is set entirely by the period you chose. Each bar that passes without a new extreme costs the line exactly 100 divided by the period. At 25, that is 4.00 points per bar, every bar, forever. At 14, it is 7.14. Nothing about price influences that number. Here is the same elapsed-bar count run at both common settings.
| Bars since the highest high | Aroon-Up at period 14 | Aroon-Up at period 25 | What the two readings imply |
|---|---|---|---|
| 0 (the extreme is the current bar) | 100.0 | 100.0 | A new lookback high just printed. Both settings are pinned at the ceiling |
| 1 | 92.9 | 96.0 | One bar has elapsed. The 14 setting has already given up more than the 25 setting |
| 3 | 78.6 | 88.0 | Both still well inside the upper band. Nothing has been signalled |
| 5 | 64.3 | 80.0 | The 14 setting has dropped out of the 70-100 zone. The 25 setting has not |
| 7 | 50.0 | 72.0 | The 14 setting hits the window midpoint, half its lookback spent |
| 10 | 28.6 | 60.0 | The 14 setting is in the weak band. The 25 setting is still above 50 |
| 12 | 14.3 | 52.0 | Same chart, same price. One reading says weak, the other says mildly constructive |
| 14 | 0.0 | 44.0 | The 14 setting is floored. The 25 setting has only just crossed below the midpoint |
The row at 12 bars is the one to sit with. Same instrument, same bars, same price action, and one chart reports 14.3 while the other reports 52.0. A trader reading the first sees a stale, exhausted move. A trader reading the second sees something still mildly constructive. Neither is misreading their indicator. They are running different windows over the same history, and there is no version of Aroon that resolves the disagreement for them.
Aroon Measures Time, Not Trend Strength
This is the thing most write-ups state in one sentence and then immediately contradict by describing Aroon as a strength gauge. The formula contains no price magnitude. None. A new high that clears the previous one by two cents produces the identical reading to a new high that clears it by four dollars, because both reset the elapsed count to zero and both return 100. The same is true in the other direction: the line decays at the same fixed rate whether price spends those bars grinding sideways half a percent below the high or collapsing eight percent away from it.
What Aroon genuinely reports is a statement about the position of the extremes inside a window. Above 50 means the extreme sits in the more recent half of the lookback. Below 50 means it sits in the older half. Near 100 means it just happened, near 0 means it is as old as the window can express. That is narrow and it is honest, and it is a genuinely different input from anything a price-derived oscillator gives you, which is the actual argument for having it on the chart at all.
Which makes the ADX comparison worth doing properly, because the two get recommended together constantly and the reason is rarely stated. ADX answers how strong a trend is. Aroon answers how long it has been since the last extreme. Those are separate questions with separate failure modes, and running both is one of the few indicator pairings where you are not just getting the same price series filtered twice. The full walkthrough of the DX calculation and what a reading above 25 does and does not mean lives in the dedicated ADX guide, and the contrast against Aroon looks like this.
| Mechanic | Aroon | ADX |
|---|---|---|
| The question it answers | How long has it been since the last lookback high, and since the last lookback low | How strongly is price trending right now, in whichever direction |
| What actually feeds the calculation | A bar count. Where inside the window the highest high and the lowest low sit | Directional movement, smoothed and normalised by true range |
| Effect of the size of the move | None. A high two cents above the last one scores identically to one four dollars above | Direct. Larger directional movement relative to range pushes the reading up |
| What it plots | Two lines, Aroon-Up and Aroon-Down, each bounded 0 to 100 | One line bounded 0 to 100, conventionally with +DI and -DI alongside |
| Is direction encoded | Yes, because up and down are separate lines that can be compared directly | No. ADX rises in downtrends too. Direction comes from +DI against -DI |
| Conventional period | 25 on the reference implementation, 14 on some platforms. See the settings section | 14 |
| Threshold convention | Above 70 is the strong band, below 30 the weak band, 50 is the window midpoint | Above 25 is commonly read as trending, below 20 as directionless |
| Reading in a flat range | Both lines drift around together in the low-to-middle zone, crossing repeatedly | Falls and stays low, which is the same message stated once instead of twice |
| Attribution | Tushar Chande, 1995 | J. Welles Wilder, 1978 |
| Shared failure mode | Degrades in sideways markets | Degrades in sideways markets |
The bottom row is the one nobody puts in the comparison table. Both degrade in the same market condition, so pairing them does not protect you from chop. It gives you two independent descriptions of a trending market and two simultaneous false readings in a flat one. That is still worth having, as long as you are not treating the second opinion as insurance.
Price is uneven. The decay is not. That is the whole indicator
Is the Default Period 25 or 14?
Both, and the split is real rather than somebody's error. StockCharts SharpCharts defaults its Aroon study to 25, which matches the original design and is the number every reference write-up traces back to Chande, calibrated with daily charts in mind. TradingView's help page for its Aroon study ships 14 as the platform default. A third published guide, LiteFinance, describes 14 as the standard while recommending 25 to 30 for swing trading and shorter windows for faster work. So the field genuinely does not agree, and quietly picking one number while writing as though it were universal is how the confusion gets propagated.
The practical version: 25 is the reference default and the one to start from if you want your readings to match what most published material describes. 14 is what you will see if you drop the study onto a TradingView chart without touching the settings, and it is roughly 78% faster off the ceiling. The choice is not about which is correct. It is about how many points you want each elapsed bar to cost.
| Period | Where the number comes from | Lost per elapsed bar | What it does to signals | Who reaches for it |
|---|---|---|---|---|
| 25 | The StockCharts SharpCharts default, matching the original design and calibrated with daily charts in mind | 4.00 points | Slower off the ceiling, fewer crossovers, each arriving later | The reference default. Treat it as the baseline before you change anything |
| 14 | TradingView's built-in default for its Aroon study | 7.14 points | Falls off 100 nearly twice as fast, so crossovers arrive sooner and more often | Widely used on intraday charts, and the reason two charts disagree |
| 25 to 30 | LiteFinance's swing-trading recommendation | 4.00 to 3.33 points | The fewest crossovers of any common setting, and the latest | Swing traders who would rather miss the first leg than take four false ones |
| 7 to 10 | LiteFinance's fast setting for shorter-term use | 14.29 to 10.00 points | Floor to ceiling on minor swings. A single quiet stretch drives a line to zero | Scalpers, and also whoever is generating the most whipsaw complaints |
| Anything else | Your own logged observation, not an article's number | 100 divided by the period | Whatever your own chart shows, which is the only number that transfers | Only after you have watched a default behave on the instrument you trade |
The swing-versus-intraday tuning guidance in rows three and four comes from one source rather than a consensus, so take it as one practitioner's recommendation rather than a settled convention. The decay column, on the other hand, is just arithmetic, and it is the only column that transfers to every instrument without testing. The general trap of lifting default periods out of an article and running them somewhere nobody tested is covered in the broader rundown of which indicators earn their space on an intraday chart, and it applies here with unusual force because Aroon's period does not merely smooth the output, it sets the entire scale.
The lines just crossed on the chart you are staring at. That is one indicator agreeing with something you had already decided.
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Grade this chartWhat Is an Aroon Indicator Buy Signal?
Every reference source describes the same three-step sequence, and the steps matter in order because taking the first one alone is where most of the false signals come from.
Step one, the crossover. Aroon-Up crosses above Aroon-Down. Mechanically this means the most recent lookback high is now more recent than the most recent lookback low. On its own it is the weakest of the three steps, because in a range the lines cross back and forth continually and each crossing satisfies this condition perfectly.
Step two, the separation across 50. Aroon-Up moves above 50 while Aroon-Down falls below it. Now the high sits in the recent half of the window and the low sits in the older half, which is a meaningfully stronger statement than the bare cross. The two lines pulling apart rather than hovering together is the part to watch.
Step three, the extreme. Aroon-Up reaches or approaches 100 while Aroon-Down sits down in the 0 to 30 band. This is the confirmation step and the conventional strong reading: consistent new highs with no new lows anywhere in the window. The sell sequence is the same three steps with the lines reversed.
The 30 and 70 levels are the conventional threshold bands, stated as explicit levels by some sources and as the 70-100 and 0-30 zones by others, which amounts to the same thing. Above 70 on a line is the strong band. Below 30 is the weak band. And the fourth state, the one that is not a signal and gets misread as one: both lines wandering along together at similar mid-to-low levels means neither extreme is recent, which is consolidation. A range-bound market produces that picture for weeks, and it looks busy on the chart because the two lines keep touching.
Worth noting what the sequence is not doing. None of the three steps reference a price level, so Aroon will confirm a breakout that is running straight into the top of a two-month range with the same enthusiasm it confirms one into clear air. Where price actually is remains a separate question that marking the levels before the session starts answers, and it is the input Aroon structurally cannot provide.
Does the Aroon Indicator Actually Work?
Not on its own, and every source that covers the question says so in some form. It works in trending markets and produces false signals in sideways, range-bound conditions, which is the identical caveat attached to the ATR band that flips sides on a close through the line and to the accelerating dot trail that reverses on contact. When three tools built from three completely different calculations share one failure mode, the failure mode belongs to the market condition rather than to any of the tools.
Aroon has a second, more specific problem on top of that one, and it follows directly from the time-based construction. Because the value is a function of where an extreme sits in a fixed window, the line moves when an old bar ages out of the window even if today's bar did nothing at all. You get a visible step in the indicator with no corresponding event in price. Lookback-window lag of that kind is unavoidable in any windowed calculation, but Aroon shows it more nakedly than most because there is no smoothing on top to hide it.
| Condition | What Aroon does | Why it misleads |
|---|---|---|
| A sideways range | Both lines drift in the middle and cross each other repeatedly | Every crossing is a fresh trend call and none of them continue. This is the whipsaw case every source on the indicator warns about, and it is the arithmetic doing exactly what it was specified to do |
| A quiet drift inside an old range | Both lines fall toward zero together and stay there | A reading of zero on both lines looks like a signal and is the absence of one. It means the window's high and low are both old, which is a description of nothing happening |
| A slow, orderly trend | Aroon-Up pins near 100 and stops moving | The line saturates. Once it is at the ceiling it cannot report that the trend got stronger, because there is no headroom left in the scale |
| A single spike bar on no follow-through | Aroon-Up jumps to 100 on that one bar | One wick is enough to reset the counter. The indicator has no size term and no volume term, so a meaningless poke through the window high reads the same as a decisive break |
| The bar where the old extreme rolls out of the window | The value jumps by a large step with no matching event in price | The move is caused by a bar aging out of the lookback, not by anything that happened today. People read these as signals constantly |
| A crossover during an earnings gap | Both counters reset at once and the lines cross on the open | The cross is a report on the gap and carries no information about whether the move continues. Gap sessions are where crossover systems collect their worst fills |
| A thin, low-volume name | The window high and low are set by prints nobody was really trading against | Aroon cannot see volume. The counter resets on a 200-share trade at the offer exactly as it would on institutional size |
| A freshly loaded chart | The window needs its full lookback to fill before the values mean anything | The first 25 bars of a 25-period Aroon are computed against an incomplete window, so the early history on a short data load is not comparable to the same bars on a long one |
One published backtest, and how far to trust it
There is one widely-cited independent test of the indicator worth quoting precisely, with its caveats bolted on rather than dropped. LiberatedStockTrader published results from more than 125,000 backtested trades running Aroon-25 across several timeframes, plus two long-horizon single-market tests. These are that one site's figures, on that site's own methodology, over periods and instruments it selected. I have not reproduced them, the study does not fully disclose its rules, and its metric labelling varies between sections. Read the table as one named source's reported output, never as a general performance statistic about Aroon.
| What was tested | Figure the study reports | How to read it |
|---|---|---|
| 1-minute chart, Aroon-25 | 27% | Below the 5-minute result, on the timeframe with the most bars and the most noise |
| 5-minute chart, Aroon-25 | 47% | The best figure the study reported across the timeframes it tested |
| 1-hour chart, Aroon-25 | 20% | Worse than either intraday timeframe above it in the same test |
| Daily chart, Aroon-25 | 3% | The study's weakest result, and the timeframe the original 25 setting was designed around |
| S&P 500, 26 years | 565% against 881% | The Aroon strategy returned less than simply holding the index over the same period |
| Boeing, 16 years | 1,329% against 119% | The same strategy on one single name beat holding it by a wide margin. Both facts are from the same study |
The last two rows are the useful part, and they are useful precisely because they disagree with each other. The same strategy badly underperformed holding the S&P 500 over 26 years and badly outperformed holding one individual name over 16. A spread that wide from one methodology is the clearest available evidence that the instrument mattered more than the indicator did, which is an argument for testing on what you actually trade rather than for or against Aroon. Whatever you conclude, do not carry the 47% around as a win rate. It is one number from one test of one parameterisation on one timeframe.
What to pair it with
The standard advice, repeated by every source that covers the limitation, is that Aroon is a confirmation tool rather than a standalone system. Three pairings come up by name. ADX, to answer the strength question Aroon structurally cannot. A moving average, usually an EMA, as a direction gate so you only take Aroon-Up crossovers above it. And a stochastic, to check whether the crossover is arriving into an already-stretched move, which is the same job a stochastic reading layered on top of RSI does with more sensitivity.
Pick one, maybe two. Stacking four indicators derived from the same price series produces agreement that feels like confirmation and is mostly the same information restated, and counting genuinely independent signals instead of counting lines on the screen is the difference between a filter and decoration. Be honest about the cost too: requiring two conditions instead of one means fewer trades and later entries on the ones that survive. Filters do not improve signals, they make them rarer.
Where Aroon Fits on a Real Chart
It answers one narrow question well: how stale is the current extreme. That is a genuinely useful thing to know, and it is information no momentum oscillator on your chart currently provides, because they are all reading the size and speed of price changes while Aroon is reading a calendar. Used as a staleness check on a move you already like, it earns its pane. Used as the reason to take a trade, it is a bar counter with an opinion.
What it cannot contribute is whether the level price is sitting at matters, what the higher timeframe is doing, whether volume confirms the break, or how much you should risk. The ordering that works is the ordinary one that the broader technical analysis overview walks through: structure and market condition first, then the indicator as the last confirmation to arrive rather than the first input, the same sequencing an intraday momentum playbook applies to its entry triggers.
What a screenshot read can and cannot see here
Worth being straight about, since this site sells a tool. SnapPChart has no Aroon field. It does not compute an Aroon-Up or an Aroon-Down, it holds no lookback window, it does not count bars since an extreme, and it carries no Aroon value at all, the way it does for trend and market structure, breaks of structure and changes of character, the moving average stack, the VWAP relationship, MACD, volume behaviour, and support and resistance as price ranges. What the engine does is read a chart screenshot you upload. So if you plot Aroon on your own platform before taking that screenshot, those two lines are part of what the analysis sees, as geometry drawn in a sub-pane. That is a picture of an indicator, not a verified computed value: it cannot confirm your period is 25 rather than 14, it cannot tell you the step you are looking at was caused by an old bar aging out of the window, and it cannot know whether your platform counts the extreme bar as zero elapsed periods or one. Which chart states a screenshot-based read genuinely carries and which it only infers from shape is the subject of the wider guide to how AI reads a chart, and a neutral description of what a single chart read covers sits on the AI chart analysis page. If the crossover is the reason you are taking the trade, verifying the crossover stays your job.
Count how many bars have passed since the highest high of the lookback window, subtract that from the period, divide by the period, multiply by 100, and that is Aroon-Up. Do the same with the lowest low for Aroon-Down. Both are bounded 0 to 100, both decay by exactly 100 divided by the period for every bar that passes without a new extreme, and neither contains any term for how far price moved. Chande built it in 1995. Above 70 is strong, below 30 is weak, 50 is the window midpoint. The buy read is cross, then separate across 50, then Aroon-Up at 100 with Aroon-Down under 30. Defaults split genuinely between 25 on the reference implementation and 14 on TradingView, and the difference is roughly 78% faster decay. Pair it with ADX, an EMA, or a stochastic. And in a flat range it will cross back and forth indefinitely, sounding confident every single time.
Frequently Asked Questions
Why does Aroon-Up sit pinned at 100 for twenty bars in a row?
Because the instrument is printing a new lookback high on most of those bars, and every time it does, the elapsed-bar counter resets to zero and the formula returns 100 again. That is the indicator working, and it is also the condition in which it tells you the least. A reading of 100 held for twenty bars and a reading of 100 on one isolated spike bar are the same number, and the line has no way to distinguish a grinding 0.4% drift that ticks a penny higher each session from a violent 9% run. If you want the second thing separated from the first, you need something with a magnitude term in it, because Aroon does not have one. The practical read on a pinned 100 is narrow but real: no meaningful pullback has happened inside the lookback window yet. The moment one does, the value starts falling at a fixed rate whether or not the trend is actually over.
Can Aroon-Up and Aroon-Down both read 100 on the same bar?
Yes, and it surprises people the first time they see it. Aroon-Up is 100 when the highest high of the lookback window is the current bar. Aroon-Down is 100 when the lowest low of the window is the current bar. A single wide outside bar that takes out both ends of the range satisfies both conditions at once, so both lines spike to the ceiling simultaneously. It happens on gap reversals, on news bars, and on the first bar of a session that opens outside the prior range and then reverses through it. The reading is not a contradiction and it is not a bug. It is the indicator correctly reporting that the most recent high and the most recent low both belong to the bar you are looking at, which is a statement about range expansion and says nothing whatsoever about direction. Traders who take the Aroon-Up spike as a buy signal on that bar are reading half of a two-sided event.
Does the Aroon indicator repaint?
No on closed bars, yes in the ordinary sense on the bar still forming. Once a bar has finished, the position of the window's high and low relative to it is fixed, so the Aroon values printed against historical bars never change when you reload the chart. The live bar is different. If price pushes to a new lookback high mid-bar, the elapsed count for Aroon-Up drops to zero and the line jumps to 100 instantly, and if price then retraces below that level before the bar closes, it can fall back. So a crossover you saw at 10:42 may not exist at 10:45. That is not repainting in the sense people usually mean, it is the same unsettled-bar behaviour every window-based indicator has. The practical consequence is the same one that applies to any close-based signal: if you alert on Aroon crossovers, alert on bar close, or you will be pinged by states that did not survive the bar.
Why do my Aroon values differ from someone else's on the same chart?
Three things to check, in order. First the period, because 25 and 14 are both shipped as defaults by mainstream platforms and a chart running one will disagree with a chart running the other on almost every bar. Second the counting convention, because implementations differ on whether the bar that contains the extreme counts as zero elapsed periods or one, and an off-by-one shifts every single reading by exactly 100 divided by the period, which is 4 points at a 25 setting and roughly 7.1 at a 14 setting. Neither convention is wrong, they are just different, and nobody documents which one they used. Third, extended-hours data, since folding pre-market and after-hours trade into your bars changes which bar holds the window's high and low, which changes the elapsed count directly. Match all three before deciding one of the two charts is broken.
Should you use the Aroon Oscillator instead of the two lines?
They carry different amounts of information and the choice is a real trade-off rather than an upgrade. The Oscillator is Aroon-Up minus Aroon-Down plotted as one line from -100 to +100, so it compresses the two-line picture into a single directional read: positive means the high is more recent than the low, negative means the reverse, and the zero crossing is the same event as the two lines crossing. What you gain is one less line to interpret and a clean zero level. What you lose is the ability to see whether both lines are low, which is the two-line chart's single most useful state, because Aroon-Up at 30 against Aroon-Down at 30 and Aroon-Up at 90 against Aroon-Down at 90 both collapse to an Oscillator reading of zero and they describe completely different markets. The first is a stale, directionless range. The second is a chart making new highs and new lows at the same time. If you only ever take the crossover, the Oscillator is fine. If you use the levels, keep both lines.
This article is for educational and informational purposes only and is not investment, financial or trading advice. The Aroon-Up and Aroon-Down formulas expressed as the period minus the number of periods since the highest high or lowest low, divided by the period and multiplied by 100, the 0 to 100 bounded scale and its interpretation around the 50 midpoint, the 30 and 70 threshold bands, the three-step crossover-then-separation-then-extreme confirmation sequence, the consolidation reading when both lines drift together, the indicator-pairing recommendations naming ADX, a moving average and a stochastic, and the attribution of the indicator to Tushar Chande in 1995 are the conventional published accounts reproduced by charting platforms and reference sources. The Sanskrit name is rendered differently by different sources, including as "Dawn's Early Light" and as the first ray of the morning sun; both are reported here and neither is presented as definitive. The default lookback period genuinely differs between platforms: StockCharts SharpCharts defaults to 25 and TradingView defaults to 14, and a third published guide describes 14 as standard while recommending 25 to 30 for swing trading and shorter windows for faster use; that divergence is stated in the body rather than resolved silently, and the swing-versus-intraday tuning guidance comes from a single source. The worked elapsed-bar table is arithmetic derived directly from the stated formula at two period settings; it is not a real security, a real trading session or a market observation. The backtest figures quoted in the limitations section, including results reported for Aroon-25 on 1-minute, 5-minute, 1-hour and daily charts across more than 125,000 backtested trades, a 26-year S&P 500 comparison of 565% against 881% for buy and hold, and a 16-year Boeing comparison of 1,329% against 119%, are published by a single third-party source, LiberatedStockTrader, using its own undisclosed rules and its own varying metric labelling; they are quoted as one named study's reported output and are not a general performance claim about the Aroon indicator, nor have they been independently reproduced here. No backtest here is my own, no period, threshold, timeframe, filter or indicator pairing described is claimed to be profitable, and no edge is claimed or implied. Indicator readings describe what price has already done and do not predict what it will do next. Day trading and active trading carry a substantial risk of loss and are not suitable for every investor. SnapPChart grades a static chart screenshot you upload and returns a setup grade, entry, stop, targets and reasoning for that single image; it does not calculate an Aroon-Up value, an Aroon-Down value, an Aroon Oscillator value, an ADX value or any other indicator value itself, does not track indicator states it has not been shown, does not scan the market, and does not track your account, positions or P&L. It can only account for indicators that are visibly drawn on the image you upload. Do your own analysis, size positions so that being wrong is survivable, and consider speaking to a licensed financial professional about your own circumstances before trading.
Writes about AI-assisted day trading, technical analysis, and the systems traders actually use to stay disciplined.
Aroon-Up crossed above Aroon-Down. That is a statement about bar counts, not about whether this chart is worth risking money on.
The crossover fires in a flat range as readily as it does at the start of a real move, because the formula has no term for either. Upload the screenshot and SnapPChart reads that one image against a fixed rubric, then returns a setup grade, an entry, a stop with the reasoning behind the level, targets, and the reward-to-risk those levels imply. One skipped bad trade covers it.