Consecutive Up and down bars

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

namespace cAlgo
{
    [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class ConsecutiveDownAndUpBars : Indicator
    {
        [Parameter()]
        public DataSeries Source { get; set; }

        [Output("Up Bars", LineColor = "Green")]
        public IndicatorDataSeries UpBarsResult { get; set; }

        [Output("Down Bars", LineColor = "Red")]
        public IndicatorDataSeries DownBarsResult { get; set; }

        public int UpBars;
        public int DownBars;

        public override void Calculate(int index)
        {

            if (MarketSeries.Close.LastValue > MarketSeries.Open.LastValue)
            {
                UpBarsResult[index] = UpBars++;
                DownBarsResult[index] = 0;
                DownBars = 0;
            }
            else
            {
                DownBarsResult[index] = DownBars++;
                UpBarsResult[index] = 0;
                UpBars = 0;
            }
        }

    }
}

Making my first indicator here, trying to have total number of down bars ina row and number of up bars in a row, but it just keeps adding +1 every tick.

Thanks for help.