/// <summary>
        /// MACD pulling back signal for strategy
        /// </summary>
        /// <returns></returns>
        public ZZMACDPullbackSignal ZZMACDPullbackSignal(Data.IDataSeries input, int mACDLongLen, int mACDShortLen)
        {
            if (cacheZZMACDPullbackSignal != null)
            {
                for (int idx = 0; idx < cacheZZMACDPullbackSignal.Length; idx++)
                {
                    if (cacheZZMACDPullbackSignal[idx].MACDLongLen == mACDLongLen && cacheZZMACDPullbackSignal[idx].MACDShortLen == mACDShortLen && cacheZZMACDPullbackSignal[idx].EqualsInput(input))
                    {
                        return(cacheZZMACDPullbackSignal[idx]);
                    }
                }
            }

            lock (checkZZMACDPullbackSignal)
            {
                checkZZMACDPullbackSignal.MACDLongLen = mACDLongLen;
                mACDLongLen = checkZZMACDPullbackSignal.MACDLongLen;
                checkZZMACDPullbackSignal.MACDShortLen = mACDShortLen;
                mACDShortLen = checkZZMACDPullbackSignal.MACDShortLen;

                if (cacheZZMACDPullbackSignal != null)
                {
                    for (int idx = 0; idx < cacheZZMACDPullbackSignal.Length; idx++)
                    {
                        if (cacheZZMACDPullbackSignal[idx].MACDLongLen == mACDLongLen && cacheZZMACDPullbackSignal[idx].MACDShortLen == mACDShortLen && cacheZZMACDPullbackSignal[idx].EqualsInput(input))
                        {
                            return(cacheZZMACDPullbackSignal[idx]);
                        }
                    }
                }

                ZZMACDPullbackSignal indicator = new ZZMACDPullbackSignal();
                indicator.BarsRequired        = BarsRequired;
                indicator.CalculateOnBarClose = CalculateOnBarClose;
#if NT7
                indicator.ForceMaximumBarsLookBack256 = ForceMaximumBarsLookBack256;
                indicator.MaximumBarsLookBack         = MaximumBarsLookBack;
#endif
                indicator.Input        = input;
                indicator.MACDLongLen  = mACDLongLen;
                indicator.MACDShortLen = mACDShortLen;
                Indicators.Add(indicator);
                indicator.SetUp();

                ZZMACDPullbackSignal[] tmp = new ZZMACDPullbackSignal[cacheZZMACDPullbackSignal == null ? 1 : cacheZZMACDPullbackSignal.Length + 1];
                if (cacheZZMACDPullbackSignal != null)
                {
                    cacheZZMACDPullbackSignal.CopyTo(tmp, 0);
                }
                tmp[tmp.Length - 1]       = indicator;
                cacheZZMACDPullbackSignal = tmp;
                return(indicator);
            }
        }
        /// <summary>
        /// MACD pulling back signal for strategy
        /// </summary>
        /// <returns></returns>
        public ZZMACDPullbackSignal ZZMACDPullbackSignal(Data.IDataSeries input, int mACDLongLen, int mACDShortLen)
        {
            if (cacheZZMACDPullbackSignal != null)
                for (int idx = 0; idx < cacheZZMACDPullbackSignal.Length; idx++)
                    if (cacheZZMACDPullbackSignal[idx].MACDLongLen == mACDLongLen && cacheZZMACDPullbackSignal[idx].MACDShortLen == mACDShortLen && cacheZZMACDPullbackSignal[idx].EqualsInput(input))
                        return cacheZZMACDPullbackSignal[idx];

            lock (checkZZMACDPullbackSignal)
            {
                checkZZMACDPullbackSignal.MACDLongLen = mACDLongLen;
                mACDLongLen = checkZZMACDPullbackSignal.MACDLongLen;
                checkZZMACDPullbackSignal.MACDShortLen = mACDShortLen;
                mACDShortLen = checkZZMACDPullbackSignal.MACDShortLen;

                if (cacheZZMACDPullbackSignal != null)
                    for (int idx = 0; idx < cacheZZMACDPullbackSignal.Length; idx++)
                        if (cacheZZMACDPullbackSignal[idx].MACDLongLen == mACDLongLen && cacheZZMACDPullbackSignal[idx].MACDShortLen == mACDShortLen && cacheZZMACDPullbackSignal[idx].EqualsInput(input))
                            return cacheZZMACDPullbackSignal[idx];

                ZZMACDPullbackSignal indicator = new ZZMACDPullbackSignal();
                indicator.BarsRequired = BarsRequired;
                indicator.CalculateOnBarClose = CalculateOnBarClose;
#if NT7
                indicator.ForceMaximumBarsLookBack256 = ForceMaximumBarsLookBack256;
                indicator.MaximumBarsLookBack = MaximumBarsLookBack;
#endif
                indicator.Input = input;
                indicator.MACDLongLen = mACDLongLen;
                indicator.MACDShortLen = mACDShortLen;
                Indicators.Add(indicator);
                indicator.SetUp();

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