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buy and hold — 2 pages

Reference RSI: Wilder's Smoothing Makes the Value Depend on Where Your Data Starts Momentum oscillator by J. Welles Wilder (1978), scaled 0-100, usually over 14 periods with lines at 70 and 30. Wilder smoothing makes the value depend on the data start point. Economy · Sep 23 Reference Bollinger Bands: The Sigma Is a Population Standard Deviation (Divide by n, Not n-1) Middle band is an N-period moving average; upper and lower are MA plus or minus K times an N-period standard deviation. Typical N=20, K=2. The sigma uses divisor n, not n-1. Economy · Sep 23