How to use custome indicator in CBOt?

Please help with my code. I want to use KeltnerChannelATR instead KelnterChannel Default.
using cAlgo.API;
using cAlgo.API.Indicators;
using System;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class KeltnerChannelsSample : Robot
    {
        
        private double _volumeInUnits;
        private KeltnerChannels _keltnerChannels;
        private bool stopLossTriggered;
        private DateTime lastTradeTime;
        private int tradesExecuted;

        [Parameter("Volume (Lots)", DefaultValue = 0.01)]
        public double VolumeInLots { get; set; }

        [Parameter("Label", DefaultValue = "Sample")]
        public string Label { get; set; }

        [Parameter("Stop Loss (pips)", DefaultValue = 30)]
        public int StopLoss { get; set; }

        [Parameter("Take Profit (pips)", DefaultValue = 50)]
        public int TakeProfit { get; set; }

        [Parameter("Keltner Channel Period", DefaultValue = 20)]
        public int KcPeriod { get; set; }

        [Parameter("ATR Period", DefaultValue = 10)]
        public int AtrPeriod { get; set; }

        [Parameter("Multiplier", DefaultValue = 2.0)]
        public double Multiplier { get; set; }

        [Parameter("Moving Average Type", DefaultValue = MovingAverageType.Simple)]
        public MovingAverageType MaType { get; set; }

        [Parameter("Start Trading Hour", DefaultValue = 0, MinValue = 0, MaxValue = 23)]
        public int StartTradingHour { get; set; }

        [Parameter("Max Trades Per Day", DefaultValue = 1, MinValue = 1)]
        public int MaxTradesPerDay { get; set; }

        public Position[] BotPositions
        {
            get { return Positions.FindAll(Label); }
        }

        protected override void OnStart()
        {
            _volumeInUnits = Symbol.QuantityToVolumeInUnits(VolumeInLots);
            _keltnerChannels = Indicators.KeltnerChannels(KcPeriod, MaType, AtrPeriod, MaType, Multiplier);
        }

        protected override void OnBar()
        {
            if (Server.Time.Day != lastTradeTime.Day)
            {
                // Reset for a new day
                lastTradeTime = Server.Time;
                stopLossTriggered = false;
                tradesExecuted = 0;
            }

            if (Server.Time.Hour < StartTradingHour)
                return; // Do not trade before the specified hour

            var upperBand = _keltnerChannels.Top.Last(1);
            var lowerBand = _keltnerChannels.Bottom.Last(1);

            if (!stopLossTriggered && tradesExecuted < MaxTradesPerDay)
            {
                if (Bars.LowPrices.Last(1) <= lowerBand)
                {
                    if (BotPositions.Length == 0)
                    {
                        ExecuteMarketOrder(TradeType.Buy, SymbolName, _volumeInUnits, Label, StopLoss, TakeProfit);
                        tradesExecuted++;
                    }
                }
                else if (Bars.HighPrices.Last(1) >= upperBand)
                {
                    ClosePositions(TradeType.Buy);
                }
            }
            else
            {
                stopLossTriggered = false;
                ClosePositions(TradeType.Sell);
            }
        }

        private void ClosePositions(TradeType tradeType)
        {
            foreach (var position in BotPositions)
            {
                if (position.TradeType != tradeType) continue;
                ClosePosition(position);
            }
        }
    }
}