Deutsch DE
Auf GitHub ansehen

Exp Moving Average FN Strategy

This strategy trades based on slope reversals of an exponential moving average (EMA). It enters long when the EMA turns upward after a decline and enters short when the EMA turns downward after a rise. Optional stop-loss and take-profit levels are defined in absolute price units.

Details

  • Entry Criteria:
    • Long: EMA slope changes from falling to rising.
    • Short: EMA slope changes from rising to falling.
  • Long/Short: Both.
  • Exit Criteria:
    • Opposite slope reversal.
    • Stop-loss or take-profit hit.
  • Stops: Yes, using absolute price distances.
  • Default Values:
    • EMA Length = 12
    • Stop Loss = 1000
    • Take Profit = 2000
    • Candle Type = 4-hour timeframe
  • Filters:
    • Category: Trend following
    • Direction: Both
    • Indicators: Single (EMA)
    • Stops: Yes
    • Complexity: Medium
    • Timeframe: Medium-term
    • Seasonality: No
    • Neural networks: No
    • Divergence: No
    • Risk level: Moderate
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>
/// EMA slope reversal strategy.
/// Enters long when EMA turns up, short when EMA turns down.
/// </summary>
public class ExpMovingAverageFnStrategy : Strategy
{
	private readonly StrategyParam<int> _length;
	private readonly StrategyParam<DataType> _candleType;

	private decimal _prevEma;
	private decimal _prevPrevEma;
	private int _count;

	public int Length { get => _length.Value; set => _length.Value = value; }
	public DataType CandleType { get => _candleType.Value; set => _candleType.Value = value; }

	public ExpMovingAverageFnStrategy()
	{
		_length = Param(nameof(Length), 12)
			.SetGreaterThanZero()
			.SetDisplay("EMA Length", "EMA period", "Indicator");

		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
			.SetDisplay("Candle Type", "Candle timeframe", "General");
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		_prevEma = 0;
		_prevPrevEma = 0;
		_count = 0;
	}

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

		var ema = new ExponentialMovingAverage { Length = Length };

		SubscribeCandles(CandleType)
			.Bind(ema, ProcessCandle)
			.Start();
	}

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

		_count++;

		if (_count < 3)
		{
			_prevPrevEma = _prevEma;
			_prevEma = emaValue;
			return;
		}

		// Buy when EMA turns up
		var turnUp = _prevEma < _prevPrevEma && emaValue > _prevEma;
		// Sell when EMA turns down
		var turnDown = _prevEma > _prevPrevEma && emaValue < _prevEma;

		if (turnUp && Position <= 0)
		{
			if (Position < 0) BuyMarket();
			BuyMarket();
		}
		else if (turnDown && Position >= 0)
		{
			if (Position > 0) SellMarket();
			SellMarket();
		}

		_prevPrevEma = _prevEma;
		_prevEma = emaValue;
	}
}