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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.
Weekly retail sales review includes research data on retail sales volumes of the US big trade outlets. This review is traditionally prepared by the American company Redbook Research – leading statistics edition of the USA in the retail field. Redbook represents detailed and independent research of all retail aspects: from familiar consumer expenditure to retail trade and sales tendencies in the stores. Information published in Redbook provides readers with a clear and full picture of retail.
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