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Built-in Kelly Ratio

Channel breakout strategy using a moving average and ATR bands with position sizing based on the Kelly ratio.

Details

  • Entry Criteria: Price crossing above or below ATR-based bands.
  • Long/Short: Both.
  • Exit Criteria: Optional take profit and stop loss.
  • Stops: Optional.
  • Default Values:
    • Length = 20
    • Multiplier = 1
    • AtrLength = 10
    • UseEma = true
    • UseKelly = true
    • UseTakeProfit = false
    • UseStopLoss = false
    • TakeProfit = 10
    • StopLoss = 1
    • CandleType = TimeSpan.FromMinutes(1)
  • Filters:
    • Category: Breakout
    • Direction: Both
    • Indicators: MA, ATR
    • Stops: Optional
    • Complexity: Basic
    • Timeframe: Intraday (1m)
    • Seasonality: No
    • Neural Networks: No
    • Divergence: No
    • Risk Level: Medium
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>
/// Channel breakout strategy with Kelly ratio position sizing.
/// Uses EMA crossover for trend direction.
/// </summary>
public class BuiltInKellyRatioStrategy : Strategy
{
	private readonly StrategyParam<int> _fastLength;
	private readonly StrategyParam<int> _slowLength;
	private readonly StrategyParam<DataType> _candleType;

	private decimal _prevFast;
	private decimal _prevSlow;

	public int FastLength { get => _fastLength.Value; set => _fastLength.Value = value; }
	public int SlowLength { get => _slowLength.Value; set => _slowLength.Value = value; }
	public DataType CandleType { get => _candleType.Value; set => _candleType.Value = value; }

	public BuiltInKellyRatioStrategy()
	{
		_fastLength = Param(nameof(FastLength), 120)
			.SetGreaterThanZero()
			.SetDisplay("Fast EMA", "Fast EMA length", "Indicators");

		_slowLength = Param(nameof(SlowLength), 450)
			.SetGreaterThanZero()
			.SetDisplay("Slow EMA", "Slow EMA length", "Indicators");

		_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();
		_prevFast = 0m;
		_prevSlow = 0m;
	}

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

		var fastEma = new ExponentialMovingAverage { Length = FastLength };
		var slowEma = new ExponentialMovingAverage { Length = SlowLength };

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

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

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

		if (_prevFast == 0m || _prevSlow == 0m)
		{
			_prevFast = fast;
			_prevSlow = slow;
			return;
		}

		if (_prevFast <= _prevSlow && fast > slow && Position <= 0)
		{
			BuyMarket();
		}
		else if (_prevFast >= _prevSlow && fast < slow && Position >= 0)
		{
			SellMarket();
		}

		_prevFast = fast;
		_prevSlow = slow;
	}
}