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Relative Strength Diffusion Index

The chart below measures the percentage of high relative strength stocks that are trading above their 50-day moving average (universe of mid and large cap stocks.)  As of 4/13/10.

The 10-day moving average of this indicator is 96% and the one-day reading is 97%.  This oscillator has shown the tendency to remain overbought for extended periods of time, while oversold measures tend to be much more abrupt.