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Bbsr Extreme

The Bbsr Extreme strategy combines Bollinger Bands breakouts with a trend filter based on a moving average. A long position appears when price rebounds from the lower band while the average is rising. A short position is opened on a pullback from the upper band when the average declines. Exits rely on ATR-based stop loss and take profit.

Details

  • Entry Criteria: Price crosses bands with trend confirmation.
  • Long/Short: Both directions.
  • Exit Criteria: ATR stop or take profit.
  • Stops: Yes, ATR based.
  • Default Values:
    • BollingerPeriod = 20
    • BollingerMultiplier = 2
    • MaLength = 7
    • AtrLength = 14
    • AtrStopMultiplier = 2
    • AtrProfitMultiplier = 3
    • CandleType = TimeSpan.FromMinutes(5).TimeFrame()
  • Filters:
    • Category: Trend following
    • Direction: Both
    • Indicators: Bollinger Bands, EMA, ATR
    • Stops: Yes
    • Complexity: Basic
    • Timeframe: Intraday (5m)
    • 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>
/// Strategy uses Bollinger Bands breakout with moving average trend filter and ATR-based exits.
/// </summary>
public class BbsrExtremeStrategy : Strategy
{
	private readonly StrategyParam<int> _bollingerPeriod;
	private readonly StrategyParam<decimal> _bollingerMultiplier;
	private readonly StrategyParam<int> _maLength;
	private readonly StrategyParam<int> _atrLength;
	private readonly StrategyParam<decimal> _atrStopMultiplier;
	private readonly StrategyParam<decimal> _atrProfitMultiplier;
	private readonly StrategyParam<DataType> _candleType;

	private decimal _prevLower;
	private decimal _prevUpper;
	private decimal _prevClose;
	private decimal _prevMa;
	private bool _isInitialized;
	private decimal _entryPrice;
	private int _cooldown;

	/// <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 BollingerMultiplier
	{
		get => _bollingerMultiplier.Value;
		set => _bollingerMultiplier.Value = value;
	}

	/// <summary>
	/// Moving average length.
	/// </summary>
	public int MaLength
	{
		get => _maLength.Value;
		set => _maLength.Value = value;
	}

	/// <summary>
	/// ATR period.
	/// </summary>
	public int AtrLength
	{
		get => _atrLength.Value;
		set => _atrLength.Value = value;
	}

	/// <summary>
	/// ATR multiplier for stop calculation.
	/// </summary>
	public decimal AtrStopMultiplier
	{
		get => _atrStopMultiplier.Value;
		set => _atrStopMultiplier.Value = value;
	}

	/// <summary>
	/// ATR multiplier for take profit.
	/// </summary>
	public decimal AtrProfitMultiplier
	{
		get => _atrProfitMultiplier.Value;
		set => _atrProfitMultiplier.Value = value;
	}

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

	/// <summary>
	/// Initializes the strategy.
	/// </summary>
	public BbsrExtremeStrategy()
	{
		_bollingerPeriod = Param(nameof(BollingerPeriod), 30)
			.SetGreaterThanZero()
			.SetDisplay("Bollinger Period", "Bollinger Bands length", "Indicators");

		_bollingerMultiplier = Param(nameof(BollingerMultiplier), 2.5m)
			.SetGreaterThanZero()
			.SetDisplay("Bollinger Multiplier", "Standard deviation multiplier", "Indicators");

		_maLength = Param(nameof(MaLength), 7)
			.SetGreaterThanZero()
			.SetDisplay("MA Length", "Length for moving average", "Indicators");

		_atrLength = Param(nameof(AtrLength), 14)
			.SetGreaterThanZero()
			.SetDisplay("ATR Length", "ATR indicator period", "Risk Management");

		_atrStopMultiplier = Param(nameof(AtrStopMultiplier), 2m)
			.SetGreaterThanZero()
			.SetDisplay("ATR Stop Multiplier", "ATR multiplier for stop", "Risk Management");

		_atrProfitMultiplier = Param(nameof(AtrProfitMultiplier), 3m)
			.SetGreaterThanZero()
			.SetDisplay("ATR Profit Multiplier", "ATR multiplier for take profit", "Risk Management");

		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(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();
		_prevLower = default;
		_prevUpper = default;
		_prevClose = default;
		_prevMa = default;
		_isInitialized = false;
		_entryPrice = 0m;
		_cooldown = 0;
	}

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

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

		var ma = new EMA
		{
			Length = MaLength
		};

		var atr = new AverageTrueRange
		{
			Length = AtrLength
		};

		var subscription = SubscribeCandles(CandleType);
		subscription
			.BindEx([bollinger, ma, atr], ProcessCandle)
			.Start();

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

	}

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

		if (values[0] is not BollingerBandsValue bbValue ||
			bbValue.UpBand is not decimal upper ||
			bbValue.LowBand is not decimal lower ||
			!values[1].IsFormed || !values[2].IsFormed)
			return;

		var maValue = values[1].GetValue<decimal>();
		var atrValue = values[2].GetValue<decimal>();

		if (!_isInitialized)
		{
			_prevLower = lower;
			_prevUpper = upper;
			_prevClose = candle.ClosePrice;
			_prevMa = maValue;
			_isInitialized = true;
			return;
		}

		if (_cooldown > 0)
			_cooldown--;

		var bull = _prevClose < _prevLower && candle.ClosePrice > lower && maValue > _prevMa;
		var bear = _prevClose > _prevUpper && candle.ClosePrice < upper && maValue < _prevMa;

		if (bull && Position <= 0 && _cooldown == 0)
		{
			BuyMarket();
			_entryPrice = candle.ClosePrice;
			_cooldown = 20;
		}
		else if (bear && Position >= 0 && _cooldown == 0)
		{
			SellMarket();
			_entryPrice = candle.ClosePrice;
			_cooldown = 20;
		}

		var stop = AtrStopMultiplier * atrValue;
		var profit = AtrProfitMultiplier * atrValue;

		if (Position > 0)
		{
			var stopPrice = _entryPrice - stop;
			var profitPrice = _entryPrice + profit;

			if (candle.LowPrice <= stopPrice || candle.HighPrice >= profitPrice)
			{
				SellMarket();
				_entryPrice = 0m;
				_cooldown = 20;
			}
		}
		else if (Position < 0)
		{
			var stopPrice = _entryPrice + stop;
			var profitPrice = _entryPrice - profit;

			if (candle.HighPrice >= stopPrice || candle.LowPrice <= profitPrice)
			{
				BuyMarket();
				_entryPrice = 0m;
				_cooldown = 20;
			}
		}

		_prevLower = lower;
		_prevUpper = upper;
		_prevClose = candle.ClosePrice;
		_prevMa = maValue;
	}
}