[blackcat] L1 Ehlers Phasor Indicator

16 may 2021

Level: 1

Background

This script was requested by @pips_v1. "A cycle is one market characteristic that can be scientifically measured. Although they can be measured, they are still maddening because they are in essence ephemeral; they come and they go. Our recent research, however, indicates there is a fundamental cycle parameter that leads us to the correct trading strategy for any current market mode." by John Ehlers

Function

John Ehlers describe the principle of phasor indicator as "One easy way to picture a cycle is as an indicator arrow bolted to a rotating shaft, as can be seen in a phasor diagram. Each time the arrowhead sweeps through one complete rotation, a cycle is completed. The phase increases uniformly throughout the cycle. The phase continues for the next cycle but is usually drawn as reset to zero to start the next cycle." The parameter we use is the phase of the cycle. The measured phase tells us with great sensitivity when we are in the trend mode, enabling the capture of a large fraction of the trend movement.


Key Signal

Phase --> Ehlers Phasor signal


Pros and Cons

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


Remarks

The 102th 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.