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Estratégia de cruzamento de médias móveis

A estratégia acompanha a relação entre uma média móvel exponencial rápida e outra lenta. Um cruzamento de alta abre ou reverte para uma posição comprada, enquanto um cruzamento de baixa abre ou reverte para uma posição vendida. Os sinais são avaliados apenas em candles concluídos.

Detalhes

  • Entrada comprada: a EMA rápida cruza acima da EMA lenta.
  • Entrada vendida: a EMA rápida cruza abaixo da EMA lenta.
  • Saída: um cruzamento oposto reverte a posição; um stop-loss percentual pode fechá-la antes.
  • Valores padrão:
    • FastLength = 100
    • SlowLength = 400
    • StopLossPercent = 2
    • CandleType = 1 minuto
  • Implementações: C# e Python.
namespace StockSharp.Samples.Strategies;

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;

/// <summary>
/// Moving average crossover strategy.
/// Enters long when fast MA crosses above slow MA.
/// Enters short when fast MA crosses below slow MA.
/// Implements stop-loss as a percentage of entry price.
/// </summary>
public class MaCrossoverStrategy : Strategy
{
	private readonly StrategyParam<int> _fastLength;
	private readonly StrategyParam<int> _slowLength;
	private readonly StrategyParam<decimal> _stopLossPercent;
	private readonly StrategyParam<DataType> _candleType;

	private decimal _entryPrice;
	private bool _isLongPosition;

	/// <summary>
	/// Fast MA period length.
	/// </summary>
	public int FastLength
	{
		get => _fastLength.Value;
		set => _fastLength.Value = value;
	}

	/// <summary>
	/// Slow MA period length.
	/// </summary>
	public int SlowLength
	{
		get => _slowLength.Value;
		set => _slowLength.Value = value;
	}

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

	/// <summary>
	/// The type of candles to use for strategy calculation.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	/// <summary>
	/// Constructor.
	/// </summary>
	public MaCrossoverStrategy()
	{
		_fastLength = Param(nameof(FastLength), 100)
			.SetGreaterThanZero()
			.SetDisplay("Fast MA Length", "Period of the fast moving average", "MA Settings")

			.SetOptimize(5, 20, 5);

		_slowLength = Param(nameof(SlowLength), 400)
			.SetGreaterThanZero()
			.SetDisplay("Slow MA Length", "Period of the slow moving average", "MA Settings")

			.SetOptimize(20, 100, 10);

		_stopLossPercent = Param(nameof(StopLossPercent), 2.0m)
			.SetGreaterThanZero()
			.SetDisplay("Stop Loss %", "Stop loss percentage from entry price", "Risk Management")

			.SetOptimize(1.0m, 5.0m, 1.0m);

		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(1).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles to use", "General");
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		// Initialize variables
		_entryPrice = 0;
		_isLongPosition = false;

	}

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

		// Create indicators
		var fastMa = new ExponentialMovingAverage { Length = FastLength };
		var slowMa = new ExponentialMovingAverage { Length = SlowLength };

		// Create and setup subscription for candles
		var subscription = SubscribeCandles(CandleType);
		
		// Previous values for crossover detection
		var previousFastValue = 0m;
		var previousSlowValue = 0m;
		var wasFastLessThanSlow = false;
		var isInitialized = false;
		
		subscription
			.Bind(fastMa, slowMa, (candle, fastValue, slowValue) =>
			{
				// Skip unfinished candles
				if (candle.State != CandleStates.Finished)
					return;

				// Check if strategy is ready to trade
				if (!IsFormedAndOnlineAndAllowTrading())
					return;
					
				// Initialize on first complete values
				if (!isInitialized && fastMa.IsFormed && slowMa.IsFormed)
				{
					previousFastValue = fastValue;
					previousSlowValue = slowValue;
					wasFastLessThanSlow = fastValue < slowValue;
					isInitialized = true;
					LogInfo($"Strategy initialized. Fast MA: {fastValue}, Slow MA: {slowValue}");
					return;
				}
				
				if (!isInitialized)
					return;

				// Current crossover state
				var isFastLessThanSlow = fastValue < slowValue;
				
				LogInfo($"Candle: {candle.OpenTime}, Close: {candle.ClosePrice}, Fast MA: {fastValue}, Slow MA: {slowValue}");
				
				// Check for crossovers
				if (wasFastLessThanSlow != isFastLessThanSlow)
				{
					// Crossover happened
					if (!isFastLessThanSlow) // Fast MA crossed above Slow MA
					{
						// Buy signal
						if (Position <= 0)
						{
							_entryPrice = candle.ClosePrice;
							_isLongPosition = true;
							BuyMarket(Volume + Math.Abs(Position));
						}
					}
					else // Fast MA crossed below Slow MA
					{
						// Sell signal
						if (Position >= 0)
						{
							_entryPrice = candle.ClosePrice;
							_isLongPosition = false;
							SellMarket(Volume + Math.Abs(Position));
						}
					}

					// Update the crossover state
					wasFastLessThanSlow = isFastLessThanSlow;
				}
				
				// Update previous values
				previousFastValue = fastValue;
				previousSlowValue = slowValue;

				CheckStopLoss(candle.ClosePrice);
			})
			.Start();

		// Setup chart if available
		var area = CreateChartArea();
		if (area != null)
		{
			DrawCandles(area, subscription);
			DrawIndicator(area, fastMa);
			DrawIndicator(area, slowMa);
			DrawOwnTrades(area);
		}
	}

	private void CheckStopLoss(decimal currentPrice)
	{
		if (_entryPrice == 0)
			return;

		var stopLossThreshold = _stopLossPercent.Value / 100.0m;
		
		if (_isLongPosition && Position > 0)
		{
			// For long positions, exit if price falls below entry price - stop percentage
			var stopPrice = _entryPrice * (1.0m - stopLossThreshold);
			if (currentPrice <= stopPrice)
			{
				SellMarket(Math.Abs(Position));
				LogInfo($"Long stop-loss triggered at {currentPrice}. Entry was {_entryPrice}, Stop level: {stopPrice}");
			}
		}
		else if (!_isLongPosition && Position < 0)
		{
			// For short positions, exit if price rises above entry price + stop percentage
			var stopPrice = _entryPrice * (1.0m + stopLossThreshold);
			if (currentPrice >= stopPrice)
			{
				BuyMarket(Math.Abs(Position));
				LogInfo($"Short stop-loss triggered at {currentPrice}. Entry was {_entryPrice}, Stop level: {stopPrice}");
			}
		}
	}
}