Relative Strength Index: Today’s Trade. Since I’m looking for extreme conditions, I almost always focus only on very overbought and very oversold conditions. I use three different RSI time frames – the shorter the duration of the relative strength index, the more I want to see an extreme reading. The time frames are RSI (2), (3) and (14 Relative Strength Index, or RSI, is a popular indicator developed by a technical analyst named J. Welles Wilder, that help traders evaluate the strength of the current market.. RSI is similar to Stochastic in that it identifies overbought and oversold conditions in the market. Business. RADARSAT International, a provider of data and information derived from a Canadian remote-sensing Earth observation satellite program overseen by the Canadian Space Agency; Relative strength index, a technical indicator used in the analysis of financial markets; RSI Corporation, RadioFrequency Safety International, a safety firm specializing in OSHA/FCC radio frequency (RF) compliance