Forex encyclopedia

The Adaptive Stochastic Oscillator (ASO) was first introduced in December 1992 in STOCKS & COMMODITIES magazine. The article was called "Stochastic RSI And Dynamic Momentum Index" by Tushar Chande. He was an author of the article and creator of the indicator. ASO represents an attempt of optimization of stochastic oscillator, as well as the method to calculate the last close price ratio to maximum/ minimum for a definite period of time. The main difference is that calculation of ASO accounts for present volatility. The faster price moves, the less oscillator window becomes and its sensibility grows. This way adaptive stochastic oscillator unites advantages of both quick and slow stochastic indicator.

Relative Volatility Index was elaborated by Donald Dorsey in 1993 and introduced in “ Technical Analysis of Stocks and Commodities” magazine. RVI is not a separate indicator; it is used to confirm signals and improve trading systems. This index measures forces of volatility movement. It does not duplicate signals of other oscillators, but just confirms them. RVI and Relative Strength Index are very much alike, but they additionally demonstrate highest and lowest points of price of standard deviation in a certain range. RVI is calculated in a way similar to calculation of RSI, but here 10-days' standard deviation of close price is taken instead of change of price.