Apparently, I've been using this without even knowing about it. I did a bunch of indicator dev stuff a while ago, and while I found many useful things, this one, popularized by Donald Dorsey, has proven quite useful to me. Does anybody know anything about Dorsey or the rel vol index? Thanks.
Friend ChatGPT Donald Dorsey is best known for creating the Relative Volatility Index (RVI), which is a technical indicator used primarily in financial markets to measure the direction of volatility. It was introduced in the early 1990s as a variation of the more commonly known Relative Strength Index (RSI), developed by J. Welles Wilder. About Donald Dorsey: Background: Donald Dorsey was a financial analyst and trader with a focus on developing technical indicators and methods to improve trading strategies. His work, particularly the RVI, has been recognized in the trading community for providing a unique perspective on market conditions. Contributions: Dorsey introduced the Relative Volatility Index as a tool to address some limitations of the RSI, particularly its focus on price movement without considering the volatility of those movements. The RVI is an adaptation that incorporates volatility, giving traders an additional layer of analysis. Relative Volatility Index (RVI): Purpose: The RVI is designed to measure the direction of volatility and helps traders assess whether the market is in a state of increasing or decreasing volatility relative to a baseline or average volatility level. Unlike the RSI, which uses price changes, the RVI uses standard deviations of price to calculate its value. Calculation: The RVI typically mirrors the RSI formula but substitutes the standard deviation of price changes over a period for the price changes themselves. Like RSI, RVI values range from 0 to 100. Values above 50 indicate that the volatility trend is more positive, suggesting that price movements are more likely to continue in the current direction. Values below 50 suggest that volatility is declining, which may precede a reversal or a consolidation phase in the market. Usage: Traders use the RVI similarly to RSI, but with a focus on volatility rather than just price momentum. It can be used in conjunction with other indicators to confirm trends, detect potential reversals, or identify overbought or oversold conditions with the added context of market volatility. Practical Applications: Trend Confirmation: When both RVI and other indicators like RSI or Moving Averages are aligned, it can provide stronger confirmation of a trend. Volatility-Based Signals: RVI can offer more nuanced signals, particularly in markets where volatility plays a significant role, such as in forex or commodities trading. Legacy: Donald Dorsey's introduction of the RVI added a valuable tool to the arsenal of technical analysts, and it remains in use today by traders who want to incorporate volatility into their analysis. It seems you've stumbled upon a useful tool that can offer deeper insights, especially if you're dealing with assets where volatility significantly impacts price behavior.
A script I use with the "Dorsey Inertia" function is using this index in it's calculation. Similar to this one... https://www.tradingview.com/script/DLKmDryJ-GKD-C-Dorsey-Inertia-Loxx/ This indicator is really an algorithm that is watching price vs an intelligent analysis of price/volatility. It's designed to filter changes in price and vol, and to accurately track the price/vol relationship.
Welles Wilder derived his ideas from Jim Sloman. "The Delta Phenomenon" of Wilder is grounded in Sloman's "Ocean Theory." Sloman work is philosophical as well as gives the technical basis by which one can craft their own 'edge.' I've found it useful to track concepts to their headwaters and see how the subsequent iterations of originations evolved the core idea.
The Relative Volatility Index also takes into account the direction of the volatility, while Historical Volatility doesn’t. RVI = (Standard Deviation of Up Periods / Standard Deviation of Down Periods) * 100 Although we might substitute StdDev with HV.