Ehlers Relative Vigor Index [CC]The Relative Vigor Index was created by John Ehlers (Cybernetic Analysis For Stocks And Futures pg 58) and this is a momentum indicator that is similar to the Accumulation Distribution Oscillator created by Jim Waters and Larry Williams. He uses digital signal processing to smooth the indicator to provide clear buy and sell signals. The idea behind this indicator is that during uptrends, prices tend to close near the high and during downtrends, prices tend to close near the low. I have included strong buy and sell signals in addition to normal ones so strong signals are darker in color and normal ones are lighter in color. Buy when the line turns green and sell when it turns red. Usually the best signals I have found for this indicator is when the indicator is below the 0 line and turns green then it is usually a sign of a strong uptrend.
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Relativevigorindex
[blackcat] L2 Ehlers Relative Vigor IndexLevel: 2
Background
John F. Ehlers introuced Relative Vigor Index in his "Cybernetic Analysis for Stocks and Futures" chapter 6 on 2004.
Function
Relative Vigor Index (RVI) uses concepts dating back over three decades and also uses modern filter and digital signal processing theory to realize those concepts as a practical and useful indicator. The RVI merges the old concepts with the new technologies. The basic idea of the RVI is that prices tend to close higher than
they open in up markets and tend to close lower than they open in down markets. The vigor of the move is thus established by where the prices reside at the end of the day. To normalize the index to the daily trading range, the change in price is divided by the maximum range of prices for the day.
The RVI is an oscillator, and we are therefore only concerned with the cycle modes of the market in its use. The sharpest rate of change for a cycle is at its midpoint. Therefore, in the ascending part of the cycle we would expect the difference between the close and open to be at a maximum. This is like a derivative in calculus, where the derivative of a sinewave produces a negative cosine wave. The derivative is therefore a waveform that leads the original sinewave by a quarter cycle. Also, from calculus, integration of a sinewave over a half-cycle period results in another sinewave delayed by a quarter cycle. Summing over a half cycle is basically the same as mathematically integrating, with the result that the waveshape of the sum is delayed by a quarter wavelength relative to the input. The net result of taking the differences and summing produces an oscillator output in phase with the cyclic component of the price. It is also possible to generate a leading function if the summation window is less than a half wavelength of the Dominant Cycle. If a cycle measurement is not available, you can sum the RVI components over a fixed default period. A nominal value of 8 is suggested because this is approximately half the period of most cycles of interest.
Key Signal
RVI ---> Relative Vigor Index fast line
Trigger ---> Relative Vigor Index 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 27th 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.
Relative Vigor IndexHere we are looking at a trend strength indicator based on the Relative Vigor Index(RVI). The RVI measures trend strength by comparing the open-close and high-low ranges for the current and three most recent periods. As a zero-centered oscillator, the RVI oscillates above and below zero to signal the strength of the trend.
As there are different ways to interpret the RVI, we have included 3 different modes for traders to choose from in the input option menu:
1. Zero-Crossing:
The RVI Histogram will turn green when it crosses above zero and red when it crosses below. Therefore, a green RVI means the trend is bullish and red means bearish. This mode is better for longer-term swing trading in comparison to the other 2 modes.
2. Increasing / Decreasing:
The RVI histogram will turn green when it is increasing(rvi >= rvi ) and red when it is decreasing. A green RVI is viewed as a bullish signal and red means bearish. This mode is a good middle-ground between the Zero-Crossing and Signal Comparison modes.
3. Signal Comparison:
Here, the RVI is compared to its signal line. If the RVI is greater than its signal line, the histogram is green, indicating a bullish trend, while red means bearish. This mode is preferred for scalping.
Hope everyone finds this one useful!
You can check out our other invite only studies/strategies at our website: profitprogrammers.com
Normalized Relative Vigor IndexThis is the Relative Vigor Index indicator just multiplied by 100 to have non-zero integer part
