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Slope Direction Line Strategy

This strategy replicates the behavior of the Slope Direction Line Expert Advisor. It analyzes the slope of a linear regression line built on closing prices. A long position is opened when the regression slope turns positive after being negative, while a short position is opened when it turns negative after being positive. Opposite positions are closed on every change of direction. Optional stop-loss and take-profit percentages protect positions via the built-in StartProtection mechanism.

Details

  • Indicator – LinearRegression from StockSharp. The strategy uses the LinearRegSlope component as the signal.
  • Signal – cross of the slope through zero. A positive slope indicates an uptrend; a negative slope signals a downtrend.
  • Entry/Exit – when the slope changes sign the current position is closed and, if allowed, a new position in the direction of the slope is opened.
  • Risk control – StartProtection is configured with user-defined take-profit and stop-loss percentages.

Parameters

Name Description
CandleType Time frame used for building candles.
Length Number of bars used in the linear regression calculation.
TakeProfitPercent Percent distance to take profit from entry price.
StopLossPercent Percent distance to stop loss from entry price.
AllowLong Permit opening long positions.
AllowShort Permit opening short positions.

Usage

  1. Add the strategy to a StockSharp application.
  2. Configure the parameters according to the desired time frame and risk.
  3. Start the strategy and monitor trades on the chart.
using System;
using System.Collections.Generic;

using Ecng.Common;

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

namespace StockSharp.Samples.Strategies;

/// <summary>
/// Strategy that trades on changes in the slope of a smoothed trend line.
/// </summary>
public class SlopeDirectionLineStrategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _length;
	private readonly StrategyParam<decimal> _takeProfitPercent;
	private readonly StrategyParam<decimal> _stopLossPercent;
	private readonly StrategyParam<bool> _allowLong;
	private readonly StrategyParam<bool> _allowShort;
	private readonly StrategyParam<int> _cooldownBars;

	private ExponentialMovingAverage _trend = null!;
	private decimal? _prevTrend;
	private decimal? _prevSlope;
	private int _cooldownRemaining;

	/// <summary>
	/// Candle type for analysis.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	/// <summary>
	/// Length of the trend calculation.
	/// </summary>
	public int Length
	{
		get => _length.Value;
		set => _length.Value = value;
	}

	/// <summary>
	/// Take-profit percentage from entry price.
	/// </summary>
	public decimal TakeProfitPercent
	{
		get => _takeProfitPercent.Value;
		set => _takeProfitPercent.Value = value;
	}

	/// <summary>
	/// Stop-loss percentage from entry price.
	/// </summary>
	public decimal StopLossPercent
	{
		get => _stopLossPercent.Value;
		set => _stopLossPercent.Value = value;
	}

	/// <summary>
	/// Allow opening long positions.
	/// </summary>
	public bool AllowLong
	{
		get => _allowLong.Value;
		set => _allowLong.Value = value;
	}

	/// <summary>
	/// Allow opening short positions.
	/// </summary>
	public bool AllowShort
	{
		get => _allowShort.Value;
		set => _allowShort.Value = value;
	}

	/// <summary>
	/// Number of completed candles to wait after a position change.
	/// </summary>
	public int CooldownBars
	{
		get => _cooldownBars.Value;
		set => _cooldownBars.Value = value;
	}

	/// <summary>
	/// Initializes a new instance of the <see cref="SlopeDirectionLineStrategy"/> class.
	/// </summary>
	public SlopeDirectionLineStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
			.SetDisplay("Candle Type", "Time frame for candles", "General");

		_length = Param(nameof(Length), 20)
			.SetGreaterThanZero()
			.SetDisplay("Trend Length", "Number of bars in the trend line", "Indicators")
			.SetOptimize(10, 30, 5);

		_takeProfitPercent = Param(nameof(TakeProfitPercent), 2m)
			.SetDisplay("Take Profit %", "Take profit percentage", "Risk")
			.SetRange(1m, 5m);

		_stopLossPercent = Param(nameof(StopLossPercent), 1m)
			.SetDisplay("Stop Loss %", "Stop loss percentage", "Risk")
			.SetRange(0.5m, 5m);

		_allowLong = Param(nameof(AllowLong), true)
			.SetDisplay("Allow Long", "Enable long entries", "Trading");

		_allowShort = Param(nameof(AllowShort), true)
			.SetDisplay("Allow Short", "Enable short entries", "Trading");

		_cooldownBars = Param(nameof(CooldownBars), 6)
			.SetDisplay("Cooldown Bars", "Completed candles to wait after a position change", "Trading");
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();

		_trend = null!;
		_prevTrend = null;
		_prevSlope = null;
		_cooldownRemaining = 0;
	}

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

		_trend = new ExponentialMovingAverage { Length = Length };

		var subscription = SubscribeCandles(CandleType);
		subscription
			.Bind(_trend, ProcessCandle)
			.Start();

		StartProtection(new Unit(TakeProfitPercent, UnitTypes.Percent), new Unit(StopLossPercent, UnitTypes.Percent));

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

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

		if (_cooldownRemaining > 0)
			_cooldownRemaining--;

		if (_prevTrend is not decimal prevTrend)
		{
			_prevTrend = trendValue;
			return;
		}

		var currentSlope = trendValue - prevTrend;
		if (_prevSlope is decimal prevSlope)
		{
			if (currentSlope > 0m && prevSlope <= 0m && _cooldownRemaining == 0)
			{
				if (Position < 0)
					BuyMarket();
				if (Position <= 0 && AllowLong)
				{
					BuyMarket();
					_cooldownRemaining = CooldownBars;
				}
			}
			else if (currentSlope < 0m && prevSlope >= 0m && _cooldownRemaining == 0)
			{
				if (Position > 0)
					SellMarket();
				if (Position >= 0 && AllowShort)
				{
					SellMarket();
					_cooldownRemaining = CooldownBars;
				}
			}
		}

		_prevTrend = trendValue;
		_prevSlope = currentSlope;
	}
}