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 New Page 2 Relative strength index The Relative Strength Index (RSI) is a financial technical analysis oscillator showing price strength by comparing upward and downward close-to-close movements. The RSI is popular because it is relatively easy to interpret. It was developed by J. Welles Wilder and published in Commodities magazine (now called Futures magazine) in June 1978, and in his New Concepts in Technical Trading Systems the same year. Calculation      RSI = 100 - 100 / (1 + RS)    RS = Average Gain / Average Loss    Average Gain = [(previous Average Gain) x 13 + current Gain] / 14    First Average Gain = Total of Gains during past 14 periods / 14    Average Loss = [(previous Average Loss) x 13 + current Loss] / 14    First Average Loss = Total of Losses during past 14 periods / 14    Note: "Losses" are reported as positive values.     How To Use Overbought/Oversold Using 70 and 30 as overbought and oversold levels respectively. Generally, if the RSI rises above 30 it is considered bullish for the underlying stock. Conversely, if the RSI falls below 70, it is a bearish signal.     Go long when RSI falls below the 30 level and rises back above it   Go short when RSI rises above the 70 level and falls back below it Divergences Buy and sell signals can also be generated by looking for positive and negative divergences between the RSI and the underlying stock. For example, consider a falling stock whose RSI rises from a low point back up to a high point. Because of how the RSI is calculated, the underlying stock will often reverse its direction soon after such a divergence. As in that example, divergences that occur after an overbought or oversold reading usually provide more reliable signals.     Go long on a positive divergence where the first trough is below 30.   Go short on a negative divergence where the first peak is above 70. Centerline Crossover The centerline for RSI is 50. Readings above and below can give the indicator a bullish or bearish tilt. On the whole, a reading above 50 indicates that average gains are higher than average losses and a reading below 50 indicates that losses are winning the battle. Some traders look for a move above 50 to confirm bullish signals or a move below 50 to confirm bearish signals.

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