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Momentum
Fisher Transform
FISHNormalizes the close within the N-period high-low range to a −1 to +1 value, then applies the Fisher Transform to convert it into a near-Gaussian distribution. Extreme readings sharply identify potential turning points.
Tips
Fisher values beyond ±2.5 are statistically extreme and often mark short-term reversals; do not fade every spike but watch for a hook-back
Combine Fisher with a trend filter: only take Fisher sell signals in a downtrend and buy signals in an uptrend to reduce false reversals
Parameters
Period
2 - 50