Colour changing MA's

Can anyone tell my why this has a gap in the lines?

Moving averages with colour changing lines to show up or down movement

using cAlgo.API;
using cAlgo.API.Indicators;
namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class MAL3 : Indicator
      { 
        public DataSeries Source { get; set; }
        
        [Parameter("P 1", DefaultValue = 8)]
        public int P1 { get; set; }
        [Parameter("P 2", DefaultValue = 34)]
        public int P2 { get; set; }
        [Parameter("P 3", DefaultValue = 96)]
        public int P3 { get; set; }
        [Parameter("P 4", DefaultValue = 408)]
        public int P4 { get; set; }
        [Parameter("M A")]
        public MovingAverageType MAType { get; set; }
        
        [Output("Up1", LineColor = "8800FF00", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Up1 { get; set; }
        
        [Output("Dn1", LineColor = "88FF0000", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Dn1 { get; set; }
        
        [Output("Up2", LineColor = "8800FF00", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Up2 { get; set; }
        
        [Output("Dn2", LineColor = "88FF0000", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Dn2 { get; set; }
        
        [Output("Up3", LineColor = "8800FF00", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Up3 { get; set; }
        
        [Output("Dn3", LineColor = "88FF0000", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Dn3 { get; set; }
        
        [Output("Up4", LineColor = "8800FF00", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Up4 { get; set; }
        
        [Output("Dn4", LineColor = "88FF0000", PlotType = PlotType.DiscontinuousLine, Thickness = 1)]
        public IndicatorDataSeries Dn4 { get; set; }
        
        MovingAverage M1;
        MovingAverage M2;
        MovingAverage M3;
        MovingAverage M4;
        
        protected override void Initialize()
        {
        M1 = Indicators.MovingAverage(Source,P1,MAType);
        M2 = Indicators.MovingAverage(Source,P2,MAType);
        M3 = Indicators.MovingAverage(Source,P3,MAType);
        M4 = Indicators.MovingAverage(Source,P4,MAType);
        
        
        }
        public override void Calculate(int index)
        {
            
      
            if (M1.Result.Last(0) >= M1.Result.Last(1))
            {
                Up1[index] = M1.Result[index];
            }
            if (M1.Result.Last(0) <= M1.Result.Last(1))
            {
                Dn1[index] = M1.Result[index];
            }
            
            if (M2.Result.Last(0) >= M2.Result.Last(1))
            {
                Up2[index] = M2.Result[index];
            }
            if (M2.Result.Last(0) <= M2.Result.Last(1))
            {
                Dn2[index] = M2.Result[index];
            }
            
            if (M3.Result.Last(0) >= M3.Result.Last(1))
            {
                Up3[index] = M3.Result[index];
            }
            if (M3.Result.Last(0) <= M3.Result.Last(1))
            {
                Dn3[index] = M3.Result[index];
            }
            
            if (M4.Result.Last(0) >= M4.Result.Last(1))
            {
                Up4[index] = M4.Result[index];
            }
            if (M4.Result.Last(0) <= M4.Result.Last(1))
            {
                Dn4[index] = M4.Result[index];
            }
                  }
             }
        }