Adding Pop-up Alert to Indicator

Hi all,

I'm interested to modify a indicator I found in order to adjust with my trading style. The original indicator is [here].

I installed cAlgo.API.Alert to the indicator by using Visual Studio and modify the original code. I would like to get a pop-up alert whenever CCI line (green) is crossing Signal line (red). However, the pop up alert is not showing whenever the condition is meet. I don't have basic programming and just learn through forum and other online source. Is my code correct? If yes, is there any setting in ctrader that I should change so the pop up will show? Thank you in advance.

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;
using cAlgo.API.Alert;
using cAlgo.API.Alert.Utility;

namespace cAlgo.Indicators
{
    [Cloud("CCI Line", "Signal", Opacity = 0.4)]
    [Levels(0)]
    [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AutoRescale = true, ScalePrecision = 3, AccessRights = AccessRights.None)]

    public class CCI_TickVolume : Indicator
    {
        [Parameter("CCI Periods", DefaultValue = 30)]
        public int cciPeriod { get; set; }
        [Parameter("WWS Period", DefaultValue = 8)]
        public int wwsPeriod { get; set; }
        [Parameter("TickVolume EMA Period", DefaultValue = 10)]
        public int tkePeriod { get; set; }
        [Parameter("TickVolume DEMA Period", DefaultValue = 10)]
        public int tkdPeriod { get; set; }
        [Parameter("TickVolume TEMA Period", DefaultValue = 5)]
        public int tktPeriod { get; set; }
    

        [Output("Up Bar", LineColor = "#FFAEDFC8", PlotType = PlotType.Histogram, Thickness = 5)]
        public IndicatorDataSeries upBar { get; set; }
        [Output("Down Bar", LineColor = "#FFFFBBBD", PlotType = PlotType.Histogram, Thickness = 5)]
        public IndicatorDataSeries downBar { get; set; }
        [Output("CCI Line", LineColor = "#FF16BB47", PlotType = PlotType.Line, Thickness = 1)]
        public IndicatorDataSeries cciline { get; set; }
        [Output("Signal", LineColor = "#FFFF3236")]
        public IndicatorDataSeries wwsline { get; set; }
        [Output("Level 0", LineColor = "#9d159d", LineStyle = LineStyle.LinesDots, Thickness = 1)]
        public IndicatorDataSeries level0 { get; set; }

        public IndicatorDataSeries tkv;
        public IndicatorDataSeries _xOpen, _xClose, _xHigh, _xLow;
        private IndicatorDataSeries UpTick, DnTick, TVI_Calculate;

        private ExponentialMovingAverage EMA_UpTick;
        private ExponentialMovingAverage EMA_DnTick;
        private ExponentialMovingAverage DEMA_UpTick;
        private ExponentialMovingAverage DEMA_DnTick;
        private ExponentialMovingAverage TVI;
        private CommodityChannelIndex cci;
        private WellesWilderSmoothing cci_wws;

        private double O, C, H, L;

        protected override void Initialize()
        {
            var index = Bars.ClosePrices.Count - 1;

            _xOpen = CreateDataSeries();
            _xClose = CreateDataSeries();
            _xHigh = CreateDataSeries();
            _xLow = CreateDataSeries();

            tkv = CreateDataSeries();
            UpTick = CreateDataSeries();
            DnTick = CreateDataSeries();
            TVI_Calculate = CreateDataSeries();

            cci = Indicators.CommodityChannelIndex(cciPeriod);
            cci_wws = Indicators.WellesWilderSmoothing(cci.Result, wwsPeriod);

            EMA_UpTick = Indicators.ExponentialMovingAverage(UpTick, tkePeriod);
            EMA_DnTick = Indicators.ExponentialMovingAverage(DnTick, tkePeriod);
            DEMA_UpTick = Indicators.ExponentialMovingAverage(EMA_UpTick.Result, tkdPeriod);
            DEMA_DnTick = Indicators.ExponentialMovingAverage(EMA_DnTick.Result, tkdPeriod);
            TVI = Indicators.ExponentialMovingAverage(TVI_Calculate, tktPeriod);
        }

        public override void Calculate(int index)
        {
            level0[index] = 0;

            wwsline[index] = cci_wws.Result[index];
            cciline[index] = cci.Result[index];

            UpTick[index] = (Bars.TickVolumes[index] + (Bars.ClosePrices[index] - Bars.OpenPrices[index]) / Symbol.TickSize) / 2;
            DnTick[index] = Bars.TickVolumes[index] - UpTick[index];

            TVI_Calculate[index] = 100 * ((DEMA_UpTick.Result[index] - DEMA_DnTick.Result[index]) / (DEMA_UpTick.Result[index] + DEMA_DnTick.Result[index]));
            tkv[index] = TVI.Result[index];

            if (tkv.IsRising())
            {
                upBar[index] = cci.Result[index];
            }
            else
            {
                downBar[index] = cci.Result[index];
            }

            O = Bars.OpenPrices[index];
            C = Bars.ClosePrices[index];
            H = Bars.HighPrices[index];
            L = Bars.LowPrices[index];

            var xClose = (((Math.Min(O, C) + L) / 2) + ((Math.Max(O, C) + H) / 2)) / 2;
            double xOpen;
            if (index > 7)
                xOpen = (_xOpen[index - 1] + _xClose[index - 1]) / 2;
            else
                xOpen = (O + C) / 2;

            _xClose[index] = xClose;
            _xOpen[index] = xOpen;
            _xHigh[index] = Math.Max(Math.Max(H, xOpen), xClose);
            _xLow[index] = Math.Min(Math.Min(L, xOpen), xClose);

           //my modification

            if (cciline[index - 1] > wwsline[index - 1] && cciline[index] < wwsline[index] )
                Notifications.ShowPopup(Bars.TimeFrame, Symbol, "Sell", "CCI Crossover Signal", Symbol.Bid, "Overbought", Server.Time);
            else if (cciline[index - 1] < wwsline[index - 1] && cciline[index] > wwsline[index] )
                Notifications.ShowPopup(Bars.TimeFrame, Symbol, "Buy", "CCI Crossover Signal", Symbol.Bid, "Oversold", Server.Time);
        }
    }
}