How the Relative Strength Index (RSI) Works As a momentum indicator, the relative strength index compares a security's strength on days when prices go up to its strength on days when prices go down.
The Accumulative Swing Index (ASI) was originally developed by J. Welles Wilder and described in detail in his book “Concepts in Technical Trading” published in 1978. The ASI was derived from Wilder’s ...
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