what is the relative strength index 
the relative strength index rsi measures the speed and range of price movements on a scale from zero to 100 but 70 and 30 are considered to be the pivotal numbers an rsi above 70 is flagged as overbought and one below 30 is considered oversold 4j welles wilder introduced the rsi in 1978 5the bottom linethe ultimate oscillator is a technical indicator that focuses on three timeframes seven 14 and 28 periods it has less volatility and fewer trade signals because it doesn t rely on a single timeframe it uses the weighted average of all three the 28 period carries the least weight you ll want to be very sure that you understand the calculation and math before you wade in and use this or any other indicator consider touching base with a professional if you re even a little unsure the comments opinions and analyses expressed on investopedia are for informational purposes online read our warranty and liability disclaimer for more info 