sonar fixes

lib/statistics/_list.md

@@ -1,22 +1,32 @@
-# Statistics indicators
-Done: 13, Todo: 6
+# Statistics
 
-*BETA - Beta coefficient (Beta, R-squared)
-*CORR - Correlation Coefficient (Correlation, P-value)
-✔️ CURVATURE - Rate of Change in Direction or Slope
-✔️ ENTROPY - Measure of Uncertainty or Disorder
-✔️ HURST - Hurst Exponent
-✔️ KURTOSIS - Measure of Tails/Peakedness
-✔️ MAX - Maximum with exponential decay
-✔️ MEDIAN - Middle value
-✔️ MIN - Minimum with exponential decay
-✔️ MODE - Most Frequent Value
-✔️ PERCENTILE - Rank Order
-*RSQUARED - Coefficient of Determination (R-squared, Adjusted R-squared)
-✔️ SKEW - Skewness, asymmetry of distribution
-✔️ SLOPE - Rate of Change, Linear Regression
-✔️ STDDEV - Standard Deviation, Measure of Spread
-*THEIL - Theil's U Statistics (U1, U2)
-*TSF - Time Series Forecast (Forecast, Confidence Interval)
-✔️ VARIANCE - Average of Squared Deviations
-✔️ ZSCORE - Standardized Score
+Statistical functions and indicators for financial analysis.
+
+## Implemented
+
+- [Beta](Beta.cs) - Beta coefficient measuring volatility relative to market
+- [Corr](Corr.cs) - Correlation coefficient between two series
+- [Curvature](Curvature.cs) - Curvature of a time series
+- [Entropy](Entropy.cs) - Information entropy of a series
+- [Hurst](Hurst.cs) - Hurst exponent for trend strength
+- [Kurtosis](Kurtosis.cs) - Kurtosis measuring tail extremity
+- [Max](Max.cs) - Maximum value over period
+- [Median](Median.cs) - Median value over period
+- [Min](Min.cs) - Minimum value over period
+- [Mode](Mode.cs) - Mode (most frequent value)
+- [Percentile](Percentile.cs) - Percentile rank calculation
+- [Skew](Skew.cs) - Skewness measuring distribution asymmetry
+- [Slope](Slope.cs) - Linear regression slope
+- [Stddev](Stddev.cs) - Standard deviation
+- [Theil](Theil.cs) - Theil's U statistics for forecast accuracy
+- [Tsf](Tsf.cs) - Time series forecast
+- [Variance](Variance.cs) - Statistical variance
+- [Zscore](Zscore.cs) - Z-score standardization
+
+## Planned
+
+- Cointegration - Test for cointegrated series
+- Granger - Granger causality test
+- Jarque-Bera - Normality test
+- Kendall - Kendall rank correlation
+- Spearman - Spearman rank correlation