blackcat1402

[blackcat] L2 Ehlers Voss Filter Strategy

Level: 2

Background

John F. Ehlers introuced Voss Filter Strategy in Aug, 2019.

Function

John Ehlers’ mining of the digital signal processing literature space in his article in this issue, “A Peek Into The Future,” brings us another interesting tool for seeing a bit below the noise surrounding price series to better locate turning points. In “A Peek Into The Future” in Aug, 2019, John Ehlers describes the calculation of a new filter that could help signal cyclical turning points in markets. As described by Dr . Ehlers , the filter has a negative group delay and while an indicator based on it cannot actually see into the future, it may provide the trader with signals in advance of other indicators. Noticing that the indicator accurately tracks the market’s peaks and valleys, Ehlers suggests that simple crossovers of the forward-looking Voss predictor with the two-pole band-pass filter may become the basis of a trading system. Having looked at the paper by Henning Voss, I personally appreciate Ehlers’ ability to reduce the calculus of the Voss presentation to six simple lines of code. I thought that the predictive nature of the VossPredictor would be a good candidate to use for one of the current favorite areas of exploration, self-tuning indicators.


Key Signal

Voss --> Ehlers Voss Filter fast line
Trigger --> Ehlers Voss Filter slow line


Pros and Cons

100% John F. Ehlers definition translation, even variable names are the same. This help readers who would like to use pine to read his book.


Remarks

The 93th 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.
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