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MFI Level Cross Strategy

This strategy uses the Money Flow Index (MFI) oscillator to identify overbought and oversold conditions. When the MFI crosses predefined threshold levels, the strategy enters or reverses positions. It can operate either in the direction of the crossing or in the opposite direction, depending on the selected trend mode.

The default configuration monitors four-hour candles and evaluates the 14-period MFI. The strategy opens a long position when the MFI falls below the lower threshold and a short position when it rises above the upper threshold. When set to "Against" mode, the entry logic is reversed to trade against the indicator direction.

Risk management is handled through built-in stop-loss and take-profit parameters expressed as percentages from the entry price.

Details

  • Entry Criteria:
    • Trend Mode: Direct:
      • Long: Previous MFI > Low level and current MFI ≤ Low level.
      • Short: Previous MFI < High level and current MFI ≥ High level.
    • Trend Mode: Against:
      • Long: Previous MFI < High level and current MFI ≥ High level.
      • Short: Previous MFI > Low level and current MFI ≤ Low level.
  • Long/Short: Both sides.
  • Exit Criteria: Position is reversed when the opposite signal appears or closed by protection module.
  • Stops: Stop-loss and take-profit expressed in percent from entry price.
  • Default Values:
    • Candle Type = 4-hour candles.
    • MFI Period = 14.
    • Low Level = 40.
    • High Level = 60.
    • Stop Loss % = 1.
    • Take Profit % = 2.
  • Filters:
    • Category: Oscillator
    • Direction: Configurable
    • Indicators: Money Flow Index
    • Stops: Yes
    • Complexity: Basic
    • Timeframe: Medium-term
    • Seasonality: No
    • Neural networks: No
    • Divergence: No
    • Risk level: Medium

Notes

This implementation relies on StockSharp's high-level API. It subscribes to candle data, binds the MFI indicator directly, and executes market orders when crossing conditions are met. Position protection is initialized once at startup to manage risk automatically.

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>
/// Money Flow Index based strategy that opens positions when the indicator crosses predefined levels.
/// The strategy can trade in the direction of the crossing or in the opposite direction based on Trend Mode.
/// </summary>
public class MfiLevelCrossStrategy : Strategy
{
	public enum TrendModes
	{
		Direct,
		Against
	}

	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _mfiPeriod;
	private readonly StrategyParam<decimal> _lowLevel;
	private readonly StrategyParam<decimal> _highLevel;
	private readonly StrategyParam<TrendModes> _trend;
	private readonly StrategyParam<decimal> _stopLossPercent;
	private readonly StrategyParam<decimal> _takeProfitPercent;

	private decimal _prevMfi;
	private bool _isFirst;

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

	/// <summary>
	/// Period for the Money Flow Index indicator.
	/// </summary>
	public int MfiPeriod { get => _mfiPeriod.Value; set => _mfiPeriod.Value = value; }

	/// <summary>
	/// Oversold threshold for the MFI.
	/// </summary>
	public decimal LowLevel { get => _lowLevel.Value; set => _lowLevel.Value = value; }

	/// <summary>
	/// Overbought threshold for the MFI.
	/// </summary>
	public decimal HighLevel { get => _highLevel.Value; set => _highLevel.Value = value; }

	/// <summary>
	/// Trading mode selection.
	/// </summary>
	public TrendModes Trend { get => _trend.Value; set => _trend.Value = value; }

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

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

	/// <summary>
	/// Initializes a new instance of the <see cref="MfiLevelCrossStrategy"/>.
	/// </summary>
	public MfiLevelCrossStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(1).TimeFrame())
			.SetDisplay("Candle Type", "Timeframe of candles used", "General");

		_mfiPeriod = Param(nameof(MfiPeriod), 14)
			.SetGreaterThanZero()
			.SetDisplay("MFI Period", "Period of the Money Flow Index indicator", "Indicator");

		_lowLevel = Param(nameof(LowLevel), 30m)
			.SetRange(0m, 100m)
			.SetDisplay("Low Level", "Oversold threshold for MFI", "Signal");

		_highLevel = Param(nameof(HighLevel), 70m)
			.SetRange(0m, 100m)
			.SetDisplay("High Level", "Overbought threshold for MFI", "Signal");

		_trend = Param(nameof(Trend), TrendModes.Direct)
			.SetDisplay("Trend Mode", "Trade with trend (Direct) or against it (Against)", "Signal");

		_stopLossPercent = Param(nameof(StopLossPercent), 1m)
			.SetRange(0m, 100m)
			.SetDisplay("Stop Loss %", "Stop loss as percent from entry price", "Risk");

		_takeProfitPercent = Param(nameof(TakeProfitPercent), 2m)
			.SetRange(0m, 100m)
			.SetDisplay("Take Profit %", "Take profit as percent from entry price", "Risk");
	}

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

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

		_prevMfi = 0m;
		_isFirst = true;
	}

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

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

		var mfi = new MoneyFlowIndex { Length = MfiPeriod };

		var subscription = SubscribeCandles(CandleType);

		subscription
			.Bind(mfi, ProcessCandle)
			.Start();

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

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

		if (_isFirst)
		{
			_prevMfi = mfiValue;
			_isFirst = false;
			return;
		}

		var crossBelowLow = _prevMfi > LowLevel && mfiValue <= LowLevel;
		var crossAboveHigh = _prevMfi < HighLevel && mfiValue >= HighLevel;

		if (Trend == TrendModes.Direct)
		{
			if (crossBelowLow && Position <= 0)
				BuyMarket();
			else if (crossAboveHigh && Position >= 0)
				SellMarket();
		}
		else
		{
			if (crossBelowLow && Position >= 0)
				SellMarket();
			else if (crossAboveHigh && Position <= 0)
				BuyMarket();
		}

		_prevMfi = mfiValue;
	}
}