Entered highs and lows · bars since rolling extremes

Aroon Calculator

Calculate Aroon Up and Aroon Down from ordered entered highs and lows, with the exact rolling window, extreme indices and bars-since counts visible.

Runs in your browserRecent-equal-extreme tie ruleNo trend or crossover signal

Enter one period and ordered high-low bars

Each output uses the current completed row and previous period minus one rows.

Entered

One completed bar per line. High must be at least low.

Aroon boundary: The two percentages only encode recency of rolling extremes. This page does not label trend, strength, crossovers, thresholds, entries or exits.

Latest Aroon pair

Entered Supplemental Indicators 1.0.0.

Derived
No Aroon values calculated yetEnter at least one complete period of ordered high-low rows, or load the audited example.

How Aroon is calculated

Aroon Up = 100 × (N − bars since window high) ÷ N
Aroon Down = 100 × (N − bars since window low) ÷ N

Version 1.0.0 follows the published MetaQuotes period-bar implementation. The first value reports at zero-based index N − 1.

If the same high or low appears more than once inside a window, the most recent occurrence wins. With this exact N-row source profile, reportable values lie above zero and at or below 100.

Assumptions and limits

  • Period must be an integer from 2 to 200.
  • At least one complete period of ordered high-low bars is required.
  • Rows must be oldest to newest and come from one symbol, timeframe and feed.
  • Other implementations can use a period-plus-one window or a different equal-extreme tie rule.
  • Trend, strength, threshold, crossover, entry and exit interpretations are withheld.

Worked example from the audited fixture

Reproduce it with “Load audited example”The eight-bar fixture uses period 5. In the latest window, the most recent highest high occurred one bar ago and the most recent lowest low two bars ago. Aroon Up = (5 − 1) ÷ 5 × 100 = 80, and Aroon Down = (5 − 2) ÷ 5 × 100 = 60.

How to interpret the result

The two values encode the age of window extremes under the most-recent-tie rule. They do not measure the size of the move between those extremes, and 80 versus 60 is not converted into a direction or trade signal.

Frequently asked questions

  • Enter a period and at least that many ordered high-low bars from one symbol, timeframe and feed.
  • One hundred times period minus bars since the window high, divided by the period.
  • One hundred times period minus bars since the window low, divided by the period.
  • The current completed row and previous period minus one rows are included.
  • Version 1.0.0 selects the most recent equal extreme, matching a current-to-older MetaQuotes series search.
  • The published source searches exactly N bars, so the oldest possible extreme is N minus one bars ago.
  • Not necessarily. A period-plus-one window or a different equal-extreme tie rule changes the values.
  • No. Trend, strength, thresholds, crossovers, entries and exits are withheld.

Sources and methodology

Wilder ADX & DMI CalculatorInspect true-range and directional-movement arithmetic.Stochastic Oscillator CalculatorMeasure close location inside an entered high-low range.Donchian Channel CalculatorInspect the rolling extrema boundaries behind the same entered bars.

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Use one broker feed, symbol and timeframe for every entered observation, and compare the source history with your terminal before relying on a platform match.

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Disclaimer: The results from this tool are estimates for educational and informational purposes only and may differ from your broker's figures. This is not financial or investment advice. Trading forex and CFDs carries a high level of risk and can result in the loss of all your capital. Always verify calculations with your broker and trade within your risk tolerance.