PINE LIBRARY

Diupdate

Library **"VolatilityIndicators"**

This is a library of**Volatility Indicators**.

It aims to facilitate the grouping of this category of indicators, and also offer the customized supply of

the parameters and sources, not being restricted to just the closing price.

thanks and credits:

1. Dynamic Zones: Leo Zamansky, Ph.D., and David Stendahl

2. Deviation: Karl Pearson (code by TradingView)

3. Variance: Ronald Fisher (code by TradingView)

4. Z-score: Veronique Valcu (code by HPotter)

5. Standard deviation: Ronald Fisher (code by TradingView)

6. ATR (Average True Range): J. Welles Wilder (code by TradingView)

7. ATRP (Average True Range Percent): millerrh

8. Historical Volatility: HPotter

9. Min-Max Scale Normalization: gorx1

10. Mean Normalization: gorx1

11. Standardization: gorx1

12. Scaling to unit length: gorx1

13. LS Volatility Index: Alexandre Wolwacz (Stormer), Fabrício Lorenz, Fábio Figueiredo (Vlad) (code by me)

14. Bollinger Bands: John Bollinger (code by TradingView)

15. Bollinger Bands %: John Bollinger (code by TradingView)

16. Bollinger Bands Width: John Bollinger (code by TradingView)

**dev(source, length, anotherSource)**

Deviation. Measure the difference between a source in relation to another source

Parameters:

**source (float)**

**length (simple int)**: (int) Sequential period to calculate the deviation

**anotherSource (float)**: (float) Source to compare

Returns: (float) Bollinger Bands Width

**variance(src, mean, length, biased, degreesOfFreedom)**

Variance. A statistical measurement of the spread between numbers in a data set. More specifically,

variance measures how far each number in the set is from the mean (average), and thus from every other number in the set.

Variance is often depicted by this symbol: σ2. It is used by both analysts and traders to determine volatility and market security.

Parameters:

**src (float)**: (float) Source to calculate variance

**mean (float)**: (float) Mean (Moving average)

**length (simple int)**: (int) The sequential period to calcule the variance (number of values in data set)

**biased (simple bool)**: (bool) Defines the type of standard deviation. If true, uses biased sample variance (n),

**degreesOfFreedom (simple int)**: (int) Degrees of freedom. The number of values in the final calculation of a statistic that are free to vary.

Default value is n-1, where n here is length. Only applies when biased parameter is defined as true.

Returns: (float) Standard deviation

**stDev(src, length, mean, biased, degreesOfFreedom)**

Measure the Standard deviation from a source in relation to it's moving average.

In this implementation, you pass the average as a parameter, allowing a more personalized calculation.

Parameters:

**src (float)**: (float) Source to calculate standard deviation

**length (simple int)**: (int) The sequential period to calcule the standard deviation

**mean (float)**: (float) Moving average.

**biased (simple bool)**: (bool) Defines the type of standard deviation. If true, uses biased sample variance (n),

else uses unbiased sample variance (n-1 or another value, as long as it is in the range between 1 and n-1), where n=length.

**degreesOfFreedom (simple int)**: (int) Degrees of freedom. The number of values in the final calculation of a statistic that are free to vary.

Default value is n-1, where n here is length.

Returns: (float) Standard deviation

**zscore(src, mean, length, biased, degreesOfFreedom)**

Z-Score. A z-score is a statistical measurement that indicates how many standard deviations a data point is from

the mean of a data set. It is also known as a standard score. The formula for calculating a z-score is (x - μ) / σ,

where x is the individual data point, μ is the mean of the data set, and σ is the standard deviation of the data set.

Z-scores are useful in identifying outliers or extreme values in a data set. A positive z-score indicates that the

data point is above the mean, while a negative z-score indicates that the data point is below the mean. A z-score of

0 indicates that the data point is equal to the mean.

Z-scores are often used in hypothesis testing and determining confidence intervals. They can also be used to compare

data sets with different units or scales, as the z-score standardizes the data. Overall, z-scores provide a way to

measure the relative position of a data point in a data

Parameters:

**src (float)**: (float) Source to calculate z-score

**mean (float)**: (float) Moving average.

**length (simple int)**: (int) The sequential period to calcule the standard deviation

**biased (simple bool)**: (bool) Defines the type of standard deviation. If true, uses biased sample variance (n),

else uses unbiased sample variance (n-1 or another value, as long as it is in the range between 1 and n-1), where n=length.

**degreesOfFreedom (simple int)**: (int) Degrees of freedom. The number of values in the final calculation of a statistic that are free to vary.

Default value is n-1, where n here is length.

Returns: (float) Z-score

**atr(source, length)**

ATR: Average True Range. Customized version with source parameter.

Parameters:

**source (float)**: (float) Source

**length (simple int)**: (int) Length (number of bars back)

Returns: (float) ATR

**atrp(length, sourceP)**

ATRP (Average True Range Percent)

Parameters:

**length (simple int)**: (int) Length (number of bars back) for ATR

**sourceP (float)**: (float) Source for calculating percentage relativity

Returns: (float) ATRP

**atrp(source, length, sourceP)**

ATRP (Average True Range Percent). Customized version with source parameter.

Parameters:

**source (float)**: (float) Source for ATR

**length (simple int)**: (int) Length (number of bars back) for ATR

**sourceP (float)**: (float) Source for calculating percentage relativity

Returns: (float) ATRP

**historicalVolatility(lengthATR, lengthHist)**

Historical Volatility

Parameters:

**lengthATR (simple int)**: (int) Length (number of bars back) for ATR

**lengthHist (simple int)**: (int) Length (number of bars back) for Historical Volatility

Returns: (float) Historical Volatility

**historicalVolatility(source, lengthATR, lengthHist)**

Historical Volatility

Parameters:

**source (float)**: (float) Source for ATR

**lengthATR (simple int)**: (int) Length (number of bars back) for ATR

**lengthHist (simple int)**: (int) Length (number of bars back) for Historical Volatility

Returns: (float) Historical Volatility

**minMaxNormalization(src, numbars)**

Min-Max Scale Normalization. Maximum and minimum values are taken from the sequential range of

numbars bars back, where numbars is a number defined by the user.

Parameters:

**src (float)**: (float) Source to normalize

**numbars (simple int)**: (int) Numbers of sequential bars back to seek for lowest and hightest values.

Returns: (float) Normalized value

**minMaxNormalization(src, numbars, minimumLimit, maximumLimit)**

Min-Max Scale Normalization. Maximum and minimum values are taken from the sequential range of

numbars bars back, where numbars is a number defined by the user.

In this implementation, the user explicitly provides the desired minimum (min) and maximum (max) values for the scale,

rather than using the minimum and maximum values from the data.

Parameters:

**src (float)**: (float) Source to normalize

**numbars (simple int)**: (int) Numbers of sequential bars back to seek for lowest and hightest values.

**minimumLimit (simple float)**: (float) Minimum value to scale

**maximumLimit (simple float)**: (float) Maximum value to scale

Returns: (float) Normalized value

**meanNormalization(src, numbars, mean)**

Mean Normalization

Parameters:

**src (float)**: (float) Source to normalize

**numbars (simple int)**: (int) Numbers of sequential bars back to seek for lowest and hightest values.

**mean (float)**: (float) Mean of source

Returns: (float) Normalized value

**standardization(src, mean, stDev)**

Standardization (Z-score Normalization). How "outside the mean" values relate to the standard deviation (ratio between first and second)

Parameters:

**src (float)**: (float) Source to normalize

**mean (float)**: (float) Mean of source

**stDev (float)**: (float) Standard Deviation

Returns: (float) Normalized value

**scalingToUnitLength(src, numbars)**

Scaling to unit length

Parameters:

**src (float)**: (float) Source to normalize

**numbars (simple int)**: (int) Numbers of sequential bars back to seek for lowest and hightest values.

Returns: (float) Normalized value

**lsVolatilityIndex(movingAverage, sourceHvol, lengthATR, lengthHist, lenNormal, lowerLimit, upperLimit)**

LS Volatility Index. Measures the volatility of price in relation to an average.

Parameters:

**movingAverage (float)**: (float) A moving average

**sourceHvol (float)**: (float) Source for calculating the historical volatility

**lengthATR (simple int)**: (float) Length for calculating the ATR (Average True Range)

**lengthHist (simple int)**: (float) Length for calculating the historical volatility

**lenNormal (simple int)**: (float) Length for normalization

**lowerLimit (simple int)**

**upperLimit (simple int)**

Returns: (float) LS Volatility Index

**lsVolatilityIndex(sourcePrice, movingAverage, sourceHvol, lengthATR, lengthHist, lenNormal, lowerLimit, upperLimit)**

LS Volatility Index. Measures the volatility of price in relation to an average.

Parameters:

**sourcePrice (float)**: (float) Source for measure the distance

**movingAverage (float)**: (float) A moving average

**sourceHvol (float)**: (float) Source for calculating the historical volatility

**lengthATR (simple int)**: (float) Length for calculating the ATR (Average True Range)

**lengthHist (simple int)**: (float) Length for calculating the historical volatility

**lenNormal (simple int)**

**lowerLimit (simple int)**

**upperLimit (simple int)**

Returns: (float) LS Volatility Index

**bollingerBands(src, length, mult, basis)**

Bollinger Bands. A Bollinger Band is a technical analysis tool defined by a set of lines plotted

two standard deviations (positively and negatively) away from a simple moving average (SMA) of the security's price,

but can be adjusted to user preferences. In this version you can pass a customized basis (moving average), not only SMA.

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) The time period to be used in calculating the standard deviation

**mult (simple float)**: (float) Multiplier used in standard deviation. Basically, the upper/lower bands are standard deviation multiplied by this.

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float) A tuple of Bollinger Bands, where index 1=basis; 2=basis+dev; 3=basis-dev; and dev=multiplier*stdev

**bollingerBands(src, length, aMult, basis)**

Bollinger Bands. A Bollinger Band is a technical analysis tool defined by a set of lines plotted

two standard deviations (positively and negatively) away from a simple moving average (SMA) of the security's price,

but can be adjusted to user preferences. In this version you can pass a customized basis (moving average), not only SMA.

Also, various multipliers can be passed, thus getting more bands (instead of just 2).

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) The time period to be used in calculating the standard deviation

**aMult (float[])**: (float[]) An array of multiplies used in standard deviation. Basically, the upper/lower bands are standard deviation multiplied by this.

This array of multipliers permit the use of various bands, not only 2.

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float[]) An array of Bollinger Bands, where:

index 1=basis; 2=basis+dev1; 3=basis-dev1; 4=basis+dev2, 5=basis-dev2, 6=basis+dev2, 7=basis-dev2, Nup=basis+devN, Nlow=basis-devN

and dev1, dev2, devN are ```multiplier N * stdev```

**bollingerBandsB(src, length, mult, basis)**

Bollinger Bands %B - or Percent Bandwidth (%B).

Quantify or display where price (or another source) is in relation to the bands.

%B can be useful in identifying trends and trading signals.

Calculation:

%B = (Current Price - Lower Band) / (Upper Band - Lower Band)

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) The time period to be used in calculating the standard deviation

**mult (simple float)**: (float) Multiplier used in standard deviation

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float) Bollinger Bands %B

**bollingerBandsB(src, length, aMult, basis)**

Bollinger Bands %B - or Percent Bandwidth (%B).

Quantify or display where price (or another source) is in relation to the bands.

%B can be useful in identifying trends and trading signals.

Calculation

%B = (Current Price - Lower Band) / (Upper Band - Lower Band)

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) The time period to be used in calculating the standard deviation

**aMult (float[])**: (float[]) Array of multiplier used in standard deviation. Basically, the upper/lower bands are standard deviation multiplied by this.

This array of multipliers permit the use of various bands, not only 2.

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float[]) An array of Bollinger Bands %B. The number of results in this array is equal the numbers of multipliers passed via parameter.

**bollingerBandsW(src, length, mult, basis)**

Bollinger Bands Width. Serve as a way to quantitatively measure the width between the Upper and Lower Bands

Calculation:

Bollinger Bands Width = (Upper Band - Lower Band) / Middle Band

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) Sequential period to calculate the standard deviation

**mult (simple float)**: (float) Multiplier used in standard deviation

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float) Bollinger Bands Width

**bollingerBandsW(src, length, aMult, basis)**

Bollinger Bands Width. Serve as a way to quantitatively measure the width between the Upper and Lower Bands

Calculation

Bollinger Bands Width = (Upper Band - Lower Band) / Middle Band

Parameters:

**src (float)**: (float) Source to calculate standard deviation used in Bollinger Bands

**length (simple int)**: (int) Sequential period to calculate the standard deviation

**aMult (float[])**: (float[]) Array of multiplier used in standard deviation. Basically, the upper/lower bands are standard deviation multiplied by this.

This array of multipliers permit the use of various bands, not only 2.

**basis (float)**: (float) Basis of Bollinger Bands (a moving average)

Returns: (float[]) An array of Bollinger Bands Width. The number of results in this array is equal the numbers of multipliers passed via parameter.

**dinamicZone(source, sampleLength, pcntAbove, pcntBelow)**

Get Dynamic Zones

Parameters:

**source (float)**: (float) Source

**sampleLength (simple int)**: (int) Sample Length

**pcntAbove (simple float)**: (float) Calculates the top of the dynamic zone, considering that the maximum values are above x% of the sample

**pcntBelow (simple float)**: (float) Calculates the bottom of the dynamic zone, considering that the minimum values are below x% of the sample

Returns: [float, float, float] A tuple with 3 series of values: (1) Upper Line of Dynamic Zone;

(2) Lower Line of Dynamic Zone; (3) Center of Dynamic Zone (x = 50%)

**Examples:**

This is a library of

It aims to facilitate the grouping of this category of indicators, and also offer the customized supply of

the parameters and sources, not being restricted to just the closing price.

thanks and credits:

1. Dynamic Zones: Leo Zamansky, Ph.D., and David Stendahl

2. Deviation: Karl Pearson (code by TradingView)

3. Variance: Ronald Fisher (code by TradingView)

4. Z-score: Veronique Valcu (code by HPotter)

5. Standard deviation: Ronald Fisher (code by TradingView)

6. ATR (Average True Range): J. Welles Wilder (code by TradingView)

7. ATRP (Average True Range Percent): millerrh

8. Historical Volatility: HPotter

9. Min-Max Scale Normalization: gorx1

10. Mean Normalization: gorx1

11. Standardization: gorx1

12. Scaling to unit length: gorx1

13. LS Volatility Index: Alexandre Wolwacz (Stormer), Fabrício Lorenz, Fábio Figueiredo (Vlad) (code by me)

14. Bollinger Bands: John Bollinger (code by TradingView)

15. Bollinger Bands %: John Bollinger (code by TradingView)

16. Bollinger Bands Width: John Bollinger (code by TradingView)

Deviation. Measure the difference between a source in relation to another source

Parameters:

Returns: (float) Bollinger Bands Width

Variance. A statistical measurement of the spread between numbers in a data set. More specifically,

variance measures how far each number in the set is from the mean (average), and thus from every other number in the set.

Variance is often depicted by this symbol: σ2. It is used by both analysts and traders to determine volatility and market security.

Parameters:

Default value is n-1, where n here is length. Only applies when biased parameter is defined as true.

Returns: (float) Standard deviation

Measure the Standard deviation from a source in relation to it's moving average.

In this implementation, you pass the average as a parameter, allowing a more personalized calculation.

Parameters:

else uses unbiased sample variance (n-1 or another value, as long as it is in the range between 1 and n-1), where n=length.

Default value is n-1, where n here is length.

Returns: (float) Standard deviation

Z-Score. A z-score is a statistical measurement that indicates how many standard deviations a data point is from

the mean of a data set. It is also known as a standard score. The formula for calculating a z-score is (x - μ) / σ,

where x is the individual data point, μ is the mean of the data set, and σ is the standard deviation of the data set.

Z-scores are useful in identifying outliers or extreme values in a data set. A positive z-score indicates that the

data point is above the mean, while a negative z-score indicates that the data point is below the mean. A z-score of

0 indicates that the data point is equal to the mean.

Z-scores are often used in hypothesis testing and determining confidence intervals. They can also be used to compare

data sets with different units or scales, as the z-score standardizes the data. Overall, z-scores provide a way to

measure the relative position of a data point in a data

Parameters:

else uses unbiased sample variance (n-1 or another value, as long as it is in the range between 1 and n-1), where n=length.

Default value is n-1, where n here is length.

Returns: (float) Z-score

ATR: Average True Range. Customized version with source parameter.

Parameters:

Returns: (float) ATR

ATRP (Average True Range Percent)

Parameters:

Returns: (float) ATRP

ATRP (Average True Range Percent). Customized version with source parameter.

Parameters:

Returns: (float) ATRP

Historical Volatility

Parameters:

Returns: (float) Historical Volatility

Historical Volatility

Parameters:

Returns: (float) Historical Volatility

Min-Max Scale Normalization. Maximum and minimum values are taken from the sequential range of

numbars bars back, where numbars is a number defined by the user.

Parameters:

Returns: (float) Normalized value

Min-Max Scale Normalization. Maximum and minimum values are taken from the sequential range of

numbars bars back, where numbars is a number defined by the user.

In this implementation, the user explicitly provides the desired minimum (min) and maximum (max) values for the scale,

rather than using the minimum and maximum values from the data.

Parameters:

Returns: (float) Normalized value

Mean Normalization

Parameters:

Returns: (float) Normalized value

Standardization (Z-score Normalization). How "outside the mean" values relate to the standard deviation (ratio between first and second)

Parameters:

Returns: (float) Normalized value

Scaling to unit length

Parameters:

Returns: (float) Normalized value

LS Volatility Index. Measures the volatility of price in relation to an average.

Parameters:

Returns: (float) LS Volatility Index

LS Volatility Index. Measures the volatility of price in relation to an average.

Parameters:

Returns: (float) LS Volatility Index

Bollinger Bands. A Bollinger Band is a technical analysis tool defined by a set of lines plotted

two standard deviations (positively and negatively) away from a simple moving average (SMA) of the security's price,

but can be adjusted to user preferences. In this version you can pass a customized basis (moving average), not only SMA.

Parameters:

Returns: (float) A tuple of Bollinger Bands, where index 1=basis; 2=basis+dev; 3=basis-dev; and dev=multiplier*stdev

Bollinger Bands. A Bollinger Band is a technical analysis tool defined by a set of lines plotted

two standard deviations (positively and negatively) away from a simple moving average (SMA) of the security's price,

but can be adjusted to user preferences. In this version you can pass a customized basis (moving average), not only SMA.

Also, various multipliers can be passed, thus getting more bands (instead of just 2).

Parameters:

This array of multipliers permit the use of various bands, not only 2.

Returns: (float[]) An array of Bollinger Bands, where:

index 1=basis; 2=basis+dev1; 3=basis-dev1; 4=basis+dev2, 5=basis-dev2, 6=basis+dev2, 7=basis-dev2, Nup=basis+devN, Nlow=basis-devN

and dev1, dev2, devN are ```multiplier N * stdev```

Bollinger Bands %B - or Percent Bandwidth (%B).

Quantify or display where price (or another source) is in relation to the bands.

%B can be useful in identifying trends and trading signals.

Calculation:

%B = (Current Price - Lower Band) / (Upper Band - Lower Band)

Parameters:

Returns: (float) Bollinger Bands %B

Bollinger Bands %B - or Percent Bandwidth (%B).

Quantify or display where price (or another source) is in relation to the bands.

%B can be useful in identifying trends and trading signals.

Calculation

%B = (Current Price - Lower Band) / (Upper Band - Lower Band)

Parameters:

This array of multipliers permit the use of various bands, not only 2.

Returns: (float[]) An array of Bollinger Bands %B. The number of results in this array is equal the numbers of multipliers passed via parameter.

Bollinger Bands Width. Serve as a way to quantitatively measure the width between the Upper and Lower Bands

Calculation:

Bollinger Bands Width = (Upper Band - Lower Band) / Middle Band

Parameters:

Returns: (float) Bollinger Bands Width

Bollinger Bands Width. Serve as a way to quantitatively measure the width between the Upper and Lower Bands

Calculation

Bollinger Bands Width = (Upper Band - Lower Band) / Middle Band

Parameters:

This array of multipliers permit the use of various bands, not only 2.

Returns: (float[]) An array of Bollinger Bands Width. The number of results in this array is equal the numbers of multipliers passed via parameter.

Get Dynamic Zones

Parameters:

Returns: [float, float, float] A tuple with 3 series of values: (1) Upper Line of Dynamic Zone;

(2) Lower Line of Dynamic Zone; (3) Center of Dynamic Zone (x = 50%)

Catatan Rilis

v2[Minor fixes]:

- Renamed "Dinamic Zones" to "Dynamic Zones";

- Added examples on main chart.

Catatan Rilis

v3Added Standard Error

Catatan Rilis

v4Added:

1. Keltner Channels.

2. Keltner Channels B% (or Percent Bandwidth): same as Bollinger Bands %B, but instead of Bollinger Bands, the logic of Keltner Channels is used to obtain the Percent Bandwidth (%B).

3. Keltner Channels W (Keltner Channels Width): same as Bollinger Bands Width, but instead of Bollinger Bands, the logic of Keltner Channels is used to obtain the Width.

4. Moving Average Envelopes.

5. Donchian Channels.

Examples:

Keltner Channels

Keltner Channels with custom source

Keltner Channels with multiple bands

Keltner Channels %B - or Percent Bandwidth (%B)

With normalization

Keltner Channels %B with multiple bands

Keltner Channels Width

Keltner Channels Width with multiple bands

Moving Average Envelopes

Moving Average Envelopes with multiple bands

Donchian Channels with custom source for high and low

Donchian Channels with multiple bands

Catatan Rilis

v5Minor fix in ta.highest/ta.lowest to function with hl2 sources.

Catatan Rilis

v6Fixed functions without export keyword.

Catatan Rilis

v7- Added t-score function. A t-score is a statistical measurement that indicates how many standard errors a data point is from

the mean of a data set. It is also known as a standard score. When to use t-score instead of z-score? When the sample size is small (n < 30).

- Now there are two ways to calculate historical volatility: Accumulated ATR Version and Returns version. Both forms of volatility calculation have their specific utilities and applications. Therefore, it is worthwhile to have both approaches available, and one should not necessarily replace the other. Each method has its advantages and may be more appropriate in different contexts.

The first approach, using the accumulated ATR, can be useful when you want to take into account the implied volatility of prices over time, reflecting broader price movements and higher impact events. It can be especially relevant in scenarios where unexpected events can drastically affect prices.

The second approach, using the standard deviation of returns, is more common and traditionally used to measure historical volatility. It considers the variability of prices relative to their average, providing a more general measure of market volatility.

Therefore, both forms of calculation have their merits and can be useful depending on the context and specific analysis needs. Having both options available gives users flexibility in choosing the most appropriate volatility measure for the situation at hand.

- The LS Volatility Index indicator has been updated to use one of these two strands.

- Minor fix in descriptions.

Catatan Rilis

v8Improvements to LS Volatility Index parameters.

Catatan Rilis

v9Added:

Price at Z-Score. Calculate the price at a given z-score, standard deviation and mean.

Parameters:

Returns: (float) Price at Z-score

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