//+------------------------------------------------------------------+
//|                                                  FeatureScale.mqh |
//|                                                     AnimateDread |
//|                                                                  |
//| THE ONE SCALING FUNCTION FOR FEATURES WITH NO NATURAL RANGE.      |
//| v / (1 + |v|) is monotone, bounded to (-1, 1) and STATELESS: it   |
//| needs no training-set mean or variance, so there is nothing to    |
//| store in a model file, nothing to keep in step with it, and no     |
//| way for one fold's scale to leak into another.                    |
//+------------------------------------------------------------------+
#ifndef WARRIOR_FEATURESCALE_MQH
#define WARRIOR_FEATURESCALE_MQH

double FeatSquash(const double v)
  {
   return v / (1.0 + MathAbs(v));
  }
#endif // WARRIOR_FEATURESCALE_MQH