[blackcat] L2 Ehlers Laguerre RSI Indicator

31 Okt 2020

Level: 2

Background

John F. Ehlers introuced Laguerre RSI Indicator in his "Cybernetic Analysis for Stocks and Futures" chapter 14 on 2004.


Function

“Truth and science always triumph over ignorance and superstition.” said by Dr. Ehlers. We can generate superior smoothing with very short filters, it follows that we should be able to create superior indicators using very short data lengths also. The use of shorter data lengths means that we can make the indicators more responsive to changes in the price. The Laguerre RSI will be used as an example.


Key Signal

RSI ---> Laguerre RSI Indicator fast line
RSI(1) ---> Laguerre RSI Indicator slow line


Pros and Cons

100% John F. Ehlers definition translation of original work, even variable names are the same. This help readers who would like to use pine to read his book. If you had read his works, then you will be quite familiar with my code style.

Remarks

The 34th script for Blackcat1402 John F. Ehlers Week publication.

Readme

In real life, I am a prolific inventor. I have successfully applied for more than 60 international and regional patents in the past 12 years. But in the past two years or so, I have tried to transfer my creativity to the development of trading strategies. Tradingview is the ideal platform for me. I am selecting and contributing some of the hundreds of scripts to publish in Tradingview community. Welcome everyone to interact with me to discuss these interesting pine scripts.

The scripts posted are categorized into 5 levels according to my efforts or manhours put into these works.

Level 1 : interesting script snippets or distinctive improvement from classic indicators or strategy. Level 1 scripts can usually appear in more complex indicators as a function module or element.

Level 2 : composite indicator/strategy. By selecting or combining several independent or dependent functions or sub indicators in proper way, the composite script exhibits a resonance phenomenon which can filter out noise or fake trading signal to enhance trading confidence level.

Level 3 : comprehensive indicator/strategy. They are simple trading systems based on my strategies. They are commonly containing several or all of entry signal, close signal, stop loss, take profit, re-entry, risk management, and position sizing techniques. Even some interesting fundamental and mass psychological aspects are incorporated.

Level 4 : script snippets or functions that do not disclose source code. Interesting element that can reveal market laws and work as raw material for indicators and strategies. If you find Level 1~2 scripts are helpful, Level 4 is a private version that took me far more efforts to develop.

Level 5 : indicator/strategy that do not disclose source code. private version of Level 3 script with my accumulated script processing skills or a large number of custom functions. I had a private function library built in past two years. Level 5 scripts use many of them to achieve private trading strategy.

11 Apr

Nota Keluaran

OVERVIEW This indicator implements the Ehlers Laguerre RSI, a modified version of the traditional RSI that uses Laguerre polynomials to reduce lag in market signals. It provides both standard and hidden bullish/bearish divergence detection capabilities.
FEATURES
• Customizable gamma parameter for adjusting sensitivity
• Real-time BUY/SELL labels at RSI crosses
• Visual representation of RSI with filled areas between current and previous values
• Comprehensive divergence detection system:

Regular bullish divergences
Hidden bullish divergences
Regular bearish divergences
Hidden bearish divergences • Alert conditions for all divergence types • Configurable lookback periods and range settings
HOW TO USE

Add the indicator to your chart
Adjust the gamma input (default 0.5) to fine-tune sensitivity
Configure divergence detection parameters:
Pivot Lookback Right/Left
Max/Min Lookback Range
Toggle visibility of bullish/bearish patterns
Monitor for:
Cross labels indicating potential entry points
Filled areas showing RSI momentum
Divergence patterns highlighted on the chart
INPUT PARAMETERS
• Price: Source price data (default: close)
• Gamma: Sensitivity parameter (default: 0.5)
• Pivot Lookback Right/Left: Range for pivot detection
• Max/Min Lookback Range: Timeframe constraints for divergences
• Plot Bullish/Bearish: Enable/disable pattern visualization
• Plot Hidden Bullish/Bearish: Show/hide hidden divergences

LIMITATIONS
• Requires sufficient historical data for accurate calculations
• Performance may vary depending on market conditions
• Divergence detection is based on user-defined parameters

NOTES
• The indicator overlays BUY/SELL labels when RSI crosses its previous value
• Filled areas use yellow for upward momentum and fuchsia for downward momentum
• Alert conditions are generated for all detected divergence patterns