Stock-indicators

The 7th release of **Stock Indicators for Python**, a Python wrapper of the Stock Indicators for .NET library.

> Please treat all versions before 1.0.0 as previews. **Expect breaking changes as we get more [community feedback](https://github.com/DaveSkender/Stock.Indicators.Python/issues) and fine-tune everything.** We will enumerate breaking changes in these release notes.

Our priorities going forward are to:

1. add all of the indicators from [Stock Indicators for .NET](https://daveskender.github.io/Stock.Indicators/).
2. work on performance tuning to improve library speed

**New Indicators**
- Gator Oscillator
- Moving Average Envelopes
- Percentage Volume Oscillator
- Pivot Points
- Pivots
- Renko Chart
- Rolling Pivot Points

**Updated Indicators**
- Beta Coefficient
- Chandelier Exit
- Williams Alligator

**Dependency**
- Bump pythonnet from 2.5.2 to 3.0.0a1
- Use .NET Standard 2.1 instead of .NET Standard 2.0.


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For more information, see the:

- [documentation site](https://daveskender.github.io/Stock.Indicators.Python/)
- [PyPI project page](https://pypi.org/project/stock-indicators/)

**Full Changelog**: https://github.com/DaveSkender/Stock.Indicators.Python/compare/0.6.0...0.7.0+24

New indicators:

- Keltner Channel
- Donchain Channel
- William %R
- R-Squared added to Correlation Coefficient output

Chores:

- update Chaikin Oscillator history requirements
- add unit tests for better code coverage

The sixth release of **Stock Indicators for Python**, a Python wrapper of the Stock Indicators for .NET library.

> Please treat all versions before 1.0.0 as previews. **Expect breaking changes as we get more [community feedback](https://github.com/DaveSkender/Stock.Indicators.Python/issues) and fine-tune everything.** We will enumerate breaking changes in these release notes.

Our priorities going forward are to:

1. add all of the indicators from [Stock Indicators for .NET](https://daveskender.github.io/Stock.Indicators/).
2. work on performance tuning to improve library speed

The below is the indicators newly added in this release:
- (preview)Doji
- (preview)Marubozu
- Ultimate Oscillator
- Volatility Stop
- Vortex Indicator (VI)
- Volume Weighted Average Price (VWAP)
- Volume Weighted Moving Average (VWMA)
- Williams %R
- Weighted Moving Average (WMA)

<details>
<summary>See all indicators</summary>

- Accumulation/Distribution Line (ADL)
- Average Directional Index (ADX)
- Williams Alligator
- Arnaud Legoux Moving Average (ALMA)
- Aroon
- Average True Range (ATR)
- Awesome Oscillator
- Beta Coefficient
- Bollinger Bands®
- Balance of Power (BOP)
- Commodity Channel Index (CCI)
- Chaikin Oscillator
- Chandelier Exit
- Choppiness Index (CHOP)
- Chaikin Money Flow (CMF)
- Connors RSI
- Correlation Coefficient
- Donchian Channels
- Double Exponential Moving Average (DEMA)
- Detrended Price Oscillator (DPO)
- Elder-ray Index
- Exponential Moving Average (EMA)
- Endpoint Moving Average (EPMA)
- Fractal Chaos Bands (FCB)
- Ehlers Fisher Transform
- Force Index
- Williams Fractal
- Heikin-Ashi
- Hull Moving Average (HMA)
- Hilbert Transform Instantaneous Trendline (HTL)
- Hurst Exponent
- Ichimoku Cloud
- Kaufman’s Adaptive Moving Average (KAMA)
- Keltner Channels
- Klinger Volume Oscillator (KVO)
- KDJ Index
- Moving Average Convergence/Divergence (MACD)
- MESA Adaptive Moving Average (MAMA)
- Money Flow Index (MFI)
- On-balance Volume (OBV)
- Parabolic SAR (stop and reverse)
- Price Momentum Oscillator (PMO)
- Price Relative Strength (PRS)
- Rate of Change (ROC)
- Relative Strength Index (RSI)
- Slope
- Simple Moving Average (SMA)
- Stochastic Momentum Index (SMI)
- Smoothed Moving Average (SMMA)
- Stoller Average Range Channel (STARC) Bands
- Schaff Trend Cycle (STC)
- Standard Deviation Channels
- Rolling Standard Deviation
- Stochastic Oscillator
- Stochastic RSI
- Super Trend
- Tillson T3
- Triple Exponential Moving Average (TEMA)
- Triple EMA Oscillator (TRIX)
- True Strength Index (TSI)
- Ulcer Index (UI)

</details>

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For more information, see the:

- [documentation site](https://daveskender.github.io/Stock.Indicators.Python/)
- [PyPI project page](https://pypi.org/project/stock-indicators/)

**Full Changelog**: https://github.com/DaveSkender/Stock.Indicators.Python/compare/0.5.0+16...0.6.0

Updated SMA indicator with additional result elements: 45

- Mean Absolute Deviation
- Mean Square Error
- Mean Absolute Percentage Error

Updated indicators:

- Added more appropriate validation on EMA history requirements. Please note that this indicator does require substantially more history due to convergence. For example, an EMA(250) requires more than 3 years of history.
Given that you may be getting your history from a feed, you'll need to handle the `BadHistoryException` or pre-validate the history you're getting to avoid surprises and errors.

- Reverted nullability for IsBullish flag on Heikin-Ashi. It was an unnecessary change.

Chores:

- Added Index value to test data spreadsheet

Updated indicators:

- added Width to Bollinger Bands result value
- added ATR Percentage (ATRP) result value

Chores:

- refactor and update unit tests