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Tendency EMA + RSI Strategy

This strategy layers a fast/medium EMA crossover on top of a slower trend EMA and an RSI filter. Long trades require the fast EMA to cross above the medium EMA while both remain above the slow trend line and the candle closes bullish. Short trades mirror these rules. RSI extremes close positions, and an optional "close after X bars" feature locks in profits if price moves in the expected direction quickly.

The approach aims to participate only in pullback entries that align with the prevailing trend, using the RSI to exit when momentum becomes overstretched. It works best on intraday charts where EMA crossovers offer timely signals and multiple setups occur each session.

Details

  • Entry Criteria:
    • Fast EMA crosses above medium EMA, both above slow EMA, bullish candle.
    • Fast EMA crosses below medium EMA, both below slow EMA, bearish candle.
  • Long/Short: Long enabled, short optional.
  • Exit Criteria:
    • RSI > 70 closes long; RSI < 30 closes short.
    • Optional: close after X bars if trade is profitable.
  • Stops: None built‑in.
  • Default Values:
    • RSI length = 14.
    • EMA A/B/C lengths = 9/21/50.
    • Close after X bars = off, X = 5.
  • Filters:
    • Category: Trend + Momentum
    • Direction: Both (long default)
    • Indicators: EMA, RSI
    • Stops: No
    • Complexity: Moderate
    • Timeframe: Short
    • Seasonality: No
    • Neural networks: No
    • Divergence: No
    • Risk level: Medium
namespace StockSharp.Samples.Strategies;

using System;
using System.Collections.Generic;

using Ecng.Common;

using StockSharp.Algo.Indicators;
using StockSharp.Algo.Strategies;
using StockSharp.BusinessEntities;
using StockSharp.Messages;

/// <summary>
/// Tendency EMA + RSI Strategy.
/// Uses EMA crossover with RSI and trend filter.
/// Buys when fast EMA crosses above medium EMA while above slow EMA.
/// Exits when RSI becomes overbought/oversold.
/// </summary>
public class TendencyEmaRsiStrategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _rsiLength;
	private readonly StrategyParam<int> _emaALength;
	private readonly StrategyParam<int> _emaBLength;
	private readonly StrategyParam<int> _emaCLength;
	private readonly StrategyParam<int> _cooldownBars;

	private RelativeStrengthIndex _rsi;
	private ExponentialMovingAverage _emaA;
	private ExponentialMovingAverage _emaB;
	private ExponentialMovingAverage _emaC;

	private decimal _prevEmaA;
	private decimal _prevEmaB;
	private int _cooldownRemaining;

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

	public int RsiLength
	{
		get => _rsiLength.Value;
		set => _rsiLength.Value = value;
	}

	public int EmaALength
	{
		get => _emaALength.Value;
		set => _emaALength.Value = value;
	}

	public int EmaBLength
	{
		get => _emaBLength.Value;
		set => _emaBLength.Value = value;
	}

	public int EmaCLength
	{
		get => _emaCLength.Value;
		set => _emaCLength.Value = value;
	}

	public int CooldownBars
	{
		get => _cooldownBars.Value;
		set => _cooldownBars.Value = value;
	}

	public TendencyEmaRsiStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(30).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles to use", "General");

		_rsiLength = Param(nameof(RsiLength), 14)
			.SetGreaterThanZero()
			.SetDisplay("RSI Length", "RSI calculation length", "RSI");

		_emaALength = Param(nameof(EmaALength), 10)
			.SetGreaterThanZero()
			.SetDisplay("EMA A Length", "Fast EMA length", "Moving Averages");

		_emaBLength = Param(nameof(EmaBLength), 20)
			.SetGreaterThanZero()
			.SetDisplay("EMA B Length", "Medium EMA length", "Moving Averages");

		_emaCLength = Param(nameof(EmaCLength), 100)
			.SetGreaterThanZero()
			.SetDisplay("EMA C Length", "Slow/Trend EMA length", "Moving Averages");

		_cooldownBars = Param(nameof(CooldownBars), 10)
			.SetDisplay("Cooldown Bars", "Bars to wait between trades", "Risk");
	}

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

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

		_rsi = null;
		_emaA = null;
		_emaB = null;
		_emaC = null;
		_prevEmaA = 0;
		_prevEmaB = 0;
		_cooldownRemaining = 0;
	}

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

		_rsi = new RelativeStrengthIndex { Length = RsiLength };
		_emaA = new ExponentialMovingAverage { Length = EmaALength };
		_emaB = new ExponentialMovingAverage { Length = EmaBLength };
		_emaC = new ExponentialMovingAverage { Length = EmaCLength };

		var subscription = SubscribeCandles(CandleType);
		subscription
			.Bind(_rsi, _emaA, _emaB, _emaC, OnProcess)
			.Start();

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

	private void OnProcess(ICandleMessage candle, decimal rsiVal, decimal emaA, decimal emaB, decimal emaC)
	{
		if (candle.State != CandleStates.Finished)
			return;

		if (!_rsi.IsFormed || !_emaA.IsFormed || !_emaB.IsFormed || !_emaC.IsFormed)
		{
			_prevEmaA = emaA;
			_prevEmaB = emaB;
			return;
		}

		if (!IsFormedAndOnlineAndAllowTrading())
		{
			_prevEmaA = emaA;
			_prevEmaB = emaB;
			return;
		}

		if (_cooldownRemaining > 0)
		{
			_cooldownRemaining--;
			_prevEmaA = emaA;
			_prevEmaB = emaB;
			return;
		}

		if (_prevEmaA == 0 || _prevEmaB == 0)
		{
			_prevEmaA = emaA;
			_prevEmaB = emaB;
			return;
		}

		// EMA crossovers
		var emaCrossUp = emaA > emaB && _prevEmaA <= _prevEmaB;
		var emaCrossDown = emaA < emaB && _prevEmaA >= _prevEmaB;

		// Buy: EMA A crosses above EMA B + EMA A > EMA C (uptrend) + bullish candle
		if (emaCrossUp && emaA > emaC && candle.ClosePrice > candle.OpenPrice && Position <= 0)
		{
			if (Position < 0)
				BuyMarket(Math.Abs(Position));
			BuyMarket(Volume);
			_cooldownRemaining = CooldownBars;
		}
		// Sell: EMA A crosses below EMA B + EMA A < EMA C (downtrend) + bearish candle
		else if (emaCrossDown && emaA < emaC && candle.ClosePrice < candle.OpenPrice && Position >= 0)
		{
			if (Position > 0)
				SellMarket(Math.Abs(Position));
			SellMarket(Volume);
			_cooldownRemaining = CooldownBars;
		}
		// Exit long: RSI overbought
		else if (Position > 0 && rsiVal > 70)
		{
			SellMarket(Math.Abs(Position));
			_cooldownRemaining = CooldownBars;
		}
		// Exit short: RSI oversold
		else if (Position < 0 && rsiVal < 30)
		{
			BuyMarket(Math.Abs(Position));
			_cooldownRemaining = CooldownBars;
		}

		_prevEmaA = emaA;
		_prevEmaB = emaB;
	}
}