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Estrategia Bollinger Stochastic

Bollinger Stochastic combina las Bandas de Bollinger con el oscilador estocástico para identificar movimientos sobreextendidos. Que el precio toque la banda exterior mientras el oscilador está en una zona extrema sugiere un posible retroceso.

Las pruebas indican un rendimiento anual promedio de aproximadamente 133%. Funciona mejor en el mercado de criptomonedas.

El sistema opera contra esos extremos, yendo largo cuando el precio toca la banda inferior con el estocástico en sobreventa, y vendiendo en corto en la banda superior con el estocástico en sobrecompra.

Un stop basado en porcentaje limita el riesgo si la reversión a la media no ocurre.

Detalles

  • Criterios de entrada: señal de indicador
  • Largo/Corto: Ambos
  • Criterios de salida: stop-loss o señal opuesta
  • Stops: Sí, basado en porcentaje
  • Valores predeterminados:
    • CandleType = 15 minute
    • StopLoss = 2%
  • Filtros:
    • Categoría: Reversión a la media
    • Dirección: Ambos
    • Indicadores: Bollinger Bands, Stochastic
    • Stops: Sí
    • Complejidad: Intermedio
    • Marco temporal: Intradía
    • Estacionalidad: No
    • Redes neuronales: No
    • Divergencia: No
    • Nivel de riesgo: Medio
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 combining Bollinger Bands and Stochastic oscillator for mean-reversion.
/// Buys when price touches lower band with oversold stochastic, sells at upper band with overbought.
/// </summary>
public class BollingerStochasticStrategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _bollingerPeriod;
	private readonly StrategyParam<decimal> _bollingerDeviation;
	private readonly StrategyParam<decimal> _stochOversold;
	private readonly StrategyParam<decimal> _stochOverbought;
	private readonly StrategyParam<int> _cooldownBars;

	private decimal _stochK;
	private int _cooldown;

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

	/// <summary>
	/// Period for Bollinger Bands calculation.
	/// </summary>
	public int BollingerPeriod
	{
		get => _bollingerPeriod.Value;
		set => _bollingerPeriod.Value = value;
	}

	/// <summary>
	/// Standard deviation multiplier for Bollinger Bands.
	/// </summary>
	public decimal BollingerDeviation
	{
		get => _bollingerDeviation.Value;
		set => _bollingerDeviation.Value = value;
	}

	/// <summary>
	/// Stochastic oversold level.
	/// </summary>
	public decimal StochOversold
	{
		get => _stochOversold.Value;
		set => _stochOversold.Value = value;
	}

	/// <summary>
	/// Stochastic overbought level.
	/// </summary>
	public decimal StochOverbought
	{
		get => _stochOverbought.Value;
		set => _stochOverbought.Value = value;
	}

	/// <summary>
	/// Cooldown bars between trades.
	/// </summary>
	public int CooldownBars
	{
		get => _cooldownBars.Value;
		set => _cooldownBars.Value = value;
	}

	/// <summary>
	/// Initializes a new instance of the <see cref="BollingerStochasticStrategy"/>.
	/// </summary>
	public BollingerStochasticStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(5).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles to use", "General");

		_bollingerPeriod = Param(nameof(BollingerPeriod), 20)
			.SetRange(10, 50)
			.SetDisplay("BB Period", "Period for Bollinger Bands", "Bollinger Settings");

		_bollingerDeviation = Param(nameof(BollingerDeviation), 2.0m)
			.SetDisplay("BB Deviation", "Standard deviation multiplier", "Bollinger Settings");

		_stochOversold = Param(nameof(StochOversold), 20m)
			.SetDisplay("Oversold Level", "Stochastic oversold level", "Stochastic Settings");

		_stochOverbought = Param(nameof(StochOverbought), 80m)
			.SetDisplay("Overbought Level", "Stochastic overbought level", "Stochastic Settings");

		_cooldownBars = Param(nameof(CooldownBars), 50)
			.SetDisplay("Cooldown Bars", "Bars between trades", "General")
			.SetRange(5, 500);
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		_stochK = 50;
		_cooldown = 0;
	}

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

		var bollinger = new BollingerBands
		{
			Length = BollingerPeriod,
			Width = BollingerDeviation
		};

		var stochastic = new StochasticOscillator();

		var subscription = SubscribeCandles(CandleType);

		// Bind stochastic with BindEx
		subscription.BindEx(stochastic, OnStochastic);

		// Bind bollinger bands with BindEx
		subscription
			.BindEx(bollinger, ProcessCandle)
			.Start();

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

			var stochArea = CreateChartArea();
			if (stochArea != null)
				DrawIndicator(stochArea, stochastic);
		}
	}

	private void OnStochastic(ICandleMessage candle, IIndicatorValue stochValue)
	{
		var stoch = (IStochasticOscillatorValue)stochValue;
		if (stoch.K is decimal k)
			_stochK = k;
	}

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

		if (!IsFormedAndOnlineAndAllowTrading())
			return;

		var bb = (BollingerBandsValue)bbValue;
		if (bb.UpBand is not decimal upper ||
			bb.LowBand is not decimal lower ||
			bb.MovingAverage is not decimal middle)
			return;

		var close = candle.ClosePrice;

		if (_cooldown > 0)
		{
			_cooldown--;
			return;
		}

		// Buy: price at lower band + stochastic oversold
		if (close <= lower && _stochK < StochOversold && Position == 0)
		{
			BuyMarket();
			_cooldown = CooldownBars;
		}
		// Sell: price at upper band + stochastic overbought
		else if (close >= upper && _stochK > StochOverbought && Position == 0)
		{
			SellMarket();
			_cooldown = CooldownBars;
		}

		// Exit long at middle band
		if (Position > 0 && close > middle)
		{
			SellMarket();
			_cooldown = CooldownBars;
		}
		// Exit short at middle band
		else if (Position < 0 && close < middle)
		{
			BuyMarket();
			_cooldown = CooldownBars;
		}
	}
}