/**
         * @param index the actual index
         * @return true, if positive divergent
         */
        private bool CalculatePositiveDivergenceStrict(int index)
        {
            IRule refIsRising    = new IsRisingRule(_indicator, _timeFrame);
            IRule otherIsFalling = new IsFallingRule(_indicator, _timeFrame);

            return((refIsRising.And(otherIsFalling)).IsSatisfied(index));
        }