/// <summary>
        /// The Price Oscillator indicator shows the variation among two moving averages for the price of a security.
        /// </summary>
        /// <returns></returns>
        public PriceOscillator PriceOscillator(Data.IDataSeries input, int fast, int slow, int smooth)
        {
            if (cachePriceOscillator != null)
            {
                for (int idx = 0; idx < cachePriceOscillator.Length; idx++)
                {
                    if (cachePriceOscillator[idx].Fast == fast && cachePriceOscillator[idx].Slow == slow && cachePriceOscillator[idx].Smooth == smooth && cachePriceOscillator[idx].EqualsInput(input))
                    {
                        return(cachePriceOscillator[idx]);
                    }
                }
            }

            lock (checkPriceOscillator)
            {
                checkPriceOscillator.Fast = fast;
                fast = checkPriceOscillator.Fast;
                checkPriceOscillator.Slow = slow;
                slow = checkPriceOscillator.Slow;
                checkPriceOscillator.Smooth = smooth;
                smooth = checkPriceOscillator.Smooth;

                if (cachePriceOscillator != null)
                {
                    for (int idx = 0; idx < cachePriceOscillator.Length; idx++)
                    {
                        if (cachePriceOscillator[idx].Fast == fast && cachePriceOscillator[idx].Slow == slow && cachePriceOscillator[idx].Smooth == smooth && cachePriceOscillator[idx].EqualsInput(input))
                        {
                            return(cachePriceOscillator[idx]);
                        }
                    }
                }

                PriceOscillator indicator = new PriceOscillator();
                indicator.BarsRequired        = BarsRequired;
                indicator.CalculateOnBarClose = CalculateOnBarClose;
#if NT7
                indicator.ForceMaximumBarsLookBack256 = ForceMaximumBarsLookBack256;
                indicator.MaximumBarsLookBack         = MaximumBarsLookBack;
#endif
                indicator.Input  = input;
                indicator.Fast   = fast;
                indicator.Slow   = slow;
                indicator.Smooth = smooth;
                Indicators.Add(indicator);
                indicator.SetUp();

                PriceOscillator[] tmp = new PriceOscillator[cachePriceOscillator == null ? 1 : cachePriceOscillator.Length + 1];
                if (cachePriceOscillator != null)
                {
                    cachePriceOscillator.CopyTo(tmp, 0);
                }
                tmp[tmp.Length - 1]  = indicator;
                cachePriceOscillator = tmp;
                return(indicator);
            }
        }
        /// <summary>
        /// The Price Oscillator indicator shows the variation among two moving averages for the price of a security.
        /// </summary>
        /// <returns></returns>
        public PriceOscillator PriceOscillator(Data.IDataSeries input, int fast, int slow, int smooth)
        {
            if (cachePriceOscillator != null)
                for (int idx = 0; idx < cachePriceOscillator.Length; idx++)
                    if (cachePriceOscillator[idx].Fast == fast && cachePriceOscillator[idx].Slow == slow && cachePriceOscillator[idx].Smooth == smooth && cachePriceOscillator[idx].EqualsInput(input))
                        return cachePriceOscillator[idx];

            lock (checkPriceOscillator)
            {
                checkPriceOscillator.Fast = fast;
                fast = checkPriceOscillator.Fast;
                checkPriceOscillator.Slow = slow;
                slow = checkPriceOscillator.Slow;
                checkPriceOscillator.Smooth = smooth;
                smooth = checkPriceOscillator.Smooth;

                if (cachePriceOscillator != null)
                    for (int idx = 0; idx < cachePriceOscillator.Length; idx++)
                        if (cachePriceOscillator[idx].Fast == fast && cachePriceOscillator[idx].Slow == slow && cachePriceOscillator[idx].Smooth == smooth && cachePriceOscillator[idx].EqualsInput(input))
                            return cachePriceOscillator[idx];

                PriceOscillator indicator = new PriceOscillator();
                indicator.BarsRequired = BarsRequired;
                indicator.CalculateOnBarClose = CalculateOnBarClose;
#if NT7
                indicator.ForceMaximumBarsLookBack256 = ForceMaximumBarsLookBack256;
                indicator.MaximumBarsLookBack = MaximumBarsLookBack;
#endif
                indicator.Input = input;
                indicator.Fast = fast;
                indicator.Slow = slow;
                indicator.Smooth = smooth;
                Indicators.Add(indicator);
                indicator.SetUp();

                PriceOscillator[] tmp = new PriceOscillator[cachePriceOscillator == null ? 1 : cachePriceOscillator.Length + 1];
                if (cachePriceOscillator != null)
                    cachePriceOscillator.CopyTo(tmp, 0);
                tmp[tmp.Length - 1] = indicator;
                cachePriceOscillator = tmp;
                return indicator;
            }
        }