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NRTR Trailing Stop Strategy

This strategy follows market trends using the NRTR (Nick R's Trend Reverse) indicator. The algorithm calculates a trailing stop level derived from the average range of recent candles. When price breaks the trailing level, the position reverses in the direction of the breakout. The system works on both long and short sides and includes optional stop-loss and take-profit protections.

The NRTR length defines the sensitivity of the trailing stop: a shorter period reacts faster but may whipsaw, while a longer period filters noise. An additional digit shift parameter adjusts the indicator to instruments with different price scales. The strategy subscribes to candles of the chosen timeframe and computes the NRTR values on each finished bar.

Details

  • Entry Logic:
    • Long: Price crosses above the NRTR level after a downtrend.
    • Short: Price crosses below the NRTR level after an uptrend.
  • Exit Logic:
    • Positions are reversed when an opposite breakout occurs.
  • Stops: Optional stop-loss and take-profit via StartProtection.
  • Default Values:
    • Length = 10
    • DigitsShift = 0
    • TakeProfit = 2000 points
    • StopLoss = 1000 points
    • CandleType = 1-hour candles
  • Filters:
    • Category: Trend following
    • Direction: Both
    • Indicators: NRTR, ATR
    • Stops: Yes
    • Complexity: Medium
    • Timeframe: Flexible
    • Seasonality: No
    • Neural networks: No
    • Divergence: No
    • Risk level: Medium
using System;
using System.Linq;
using System.Collections.Generic;

using Ecng.Common;
using Ecng.Collections;
using Ecng.Serialization;

using StockSharp.Algo.Indicators;
using StockSharp.Algo.Strategies;
using StockSharp.BusinessEntities;
using StockSharp.Messages;

namespace StockSharp.Samples.Strategies;

/// <summary>
/// NRTR trailing stop strategy based on the NRTR indicator.
/// Opens long when trend turns up and short when trend turns down.
/// Includes optional stop-loss and take-profit.
/// </summary>
public class NrtrTrailingStopStrategy : Strategy
{
	private readonly StrategyParam<int> _length;
	private readonly StrategyParam<int> _digitsShift;
	private readonly StrategyParam<decimal> _takeProfit;
	private readonly StrategyParam<decimal> _stopLoss;
	private readonly StrategyParam<DataType> _candleType;

	private decimal _price;
	private decimal _value;
	private int _trend;
	private bool _isInitialized;

	/// <summary>
	/// Number of bars for average range calculation.
	/// </summary>
	public int Length
	{
		get => _length.Value;
		set => _length.Value = value;
	}

	/// <summary>
	/// Digits adjustment for indicator sensitivity.
	/// </summary>
	public int DigitsShift
	{
		get => _digitsShift.Value;
		set => _digitsShift.Value = value;
	}

	/// <summary>
	/// Take-profit in price points.
	/// </summary>
	public decimal TakeProfit
	{
		get => _takeProfit.Value;
		set => _takeProfit.Value = value;
	}

	/// <summary>
	/// Stop-loss in price points.
	/// </summary>
	public decimal StopLoss
	{
		get => _stopLoss.Value;
		set => _stopLoss.Value = value;
	}

	/// <summary>
	/// Type of candles used for calculations.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	/// <summary>
	/// Initializes a new instance of <see cref="NrtrTrailingStopStrategy"/>.
	/// </summary>
	public NrtrTrailingStopStrategy()
	{
		_length = Param(nameof(Length), 20)
			.SetGreaterThanZero()
			.SetDisplay("NRTR Length", "Number of bars for average range", "Indicator")
			
			.SetOptimize(5, 20, 5);

		_digitsShift = Param(nameof(DigitsShift), 0)
			.SetDisplay("Digits Shift", "Adjustment for price digits", "Indicator");

		_takeProfit = Param(nameof(TakeProfit), 2000m)
			.SetNotNegative()
			.SetDisplay("Take Profit (pts)", "Take profit level in points", "Risk")
			
			.SetOptimize(500m, 3000m, 500m);

		_stopLoss = Param(nameof(StopLoss), 1000m)
			.SetNotNegative()
			.SetDisplay("Stop Loss (pts)", "Stop loss level in points", "Risk")
			
			.SetOptimize(500m, 3000m, 500m);

		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles for processing", "General");
	}

	/// <inheritdoc />
	public override IEnumerable<(Security sec, DataType dt)> GetWorkingSecurities()
	{
		return [(Security, CandleType)];
	}

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		_price = 0m;
		_value = 0m;
		_trend = 0;
		_isInitialized = false;
	}

	/// <inheritdoc />
	protected override void OnStarted2(DateTime time)
	{
		base.OnStarted2(time);

		var atr = new AverageTrueRange { Length = Length };
		var subscription = SubscribeCandles(CandleType);
		subscription.BindEx(atr, ProcessCandle).Start();

		var area = CreateChartArea();
		if (area != null)
		{
			DrawCandles(area, subscription);
			DrawOwnTrades(area);
		}

	}

	private void ProcessCandle(ICandleMessage candle, IIndicatorValue atrValue)
	{
		if (candle.State != CandleStates.Finished)
			return;

		if (!atrValue.IsFormed)
			return;

		var atr = atrValue.GetValue<decimal>();
		var dK = atr / Length * (decimal)Math.Pow(10, -DigitsShift);

		if (!_isInitialized)
		{
			_price = candle.ClosePrice;
			_value = _price;
			_trend = 0;
			_isInitialized = true;
			return;
		}

		var isOnline = IsFormedAndOnlineAndAllowTrading();

		if (_trend >= 0)
		{
			_price = Math.Max(_price, candle.ClosePrice);
			_value = Math.Max(_value, _price * (1m - dK));
			if (candle.ClosePrice < _value)
			{
				_price = candle.ClosePrice;
				_value = _price * (1m + dK);
				_trend = -1;
				if (isOnline && Position >= 0)
					SellMarket();
			}
		}
		else
		{
			_price = Math.Min(_price, candle.ClosePrice);
			_value = Math.Min(_value, _price * (1m + dK));
			if (candle.ClosePrice > _value)
			{
				_price = candle.ClosePrice;
				_value = _price * (1m - dK);
				_trend = 1;
				if (isOnline && Position <= 0)
					BuyMarket();
			}
		}
	}
}