Relative Vigor Index (RVI) – is an oscillator used for technical analysis in Forex.
An author of this index is John Enlers known for application of cycles in technical analysis of the market. The first time RVI indicator was mentioned in Stocks and Commodities magazine in 2002. In this article author says that during growth close price of bar is higher than open price and the opposite tendency was observed by him in descending market. RVI index is built on the basis of this statement.