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Shooting Star Pattern

The shooting star candlestick often appears after an advance and warns of a reversal. This strategy looks for a long upper shadow relative to the body with little lower shadow.

Testing indicates an average annual return of about 67%. It performs best in the stocks market.

If confirmation is required, the next candle must close lower before entering short. Otherwise the trade can be taken immediately. Stops are placed above the pattern high.

Details

  • Entry Criteria: Shooting star detected and confirmation if enabled.
  • Long/Short: Short only.
  • Exit Criteria: Stop-loss or discretionary exit.
  • Stops: Yes.
  • Default Values:
    • ShadowToBodyRatio = 2.0m
    • CandleType = TimeSpan.FromMinutes(15)
    • StopLossPercent = 1.0m
    • ConfirmationRequired = true
  • Filters:
    • Category: Pattern
    • Direction: Short
    • Indicators: Candlestick
    • Stops: Yes
    • Complexity: Intermediate
    • Timeframe: Intraday
    • 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>
/// Shooting Star strategy.
/// Enters short on shooting star pattern (long upper shadow, small lower shadow).
/// Enters long on inverted shooting star (long lower shadow, small upper shadow).
/// Exits via SMA crossover.
/// </summary>
public class ShootingStarStrategy : Strategy
{
	private readonly StrategyParam<decimal> _shadowToBodyRatio;
	private readonly StrategyParam<int> _maPeriod;
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _cooldownBars;

	private int _cooldown;

	/// <summary>
	/// Shadow to body ratio.
	/// </summary>
	public decimal ShadowToBodyRatio
	{
		get => _shadowToBodyRatio.Value;
		set => _shadowToBodyRatio.Value = value;
	}

	/// <summary>
	/// MA Period for exit.
	/// </summary>
	public int MAPeriod
	{
		get => _maPeriod.Value;
		set => _maPeriod.Value = value;
	}

	/// <summary>
	/// Type of candles to use.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	/// <summary>
	/// Cooldown bars between trades.
	/// </summary>
	public int CooldownBars
	{
		get => _cooldownBars.Value;
		set => _cooldownBars.Value = value;
	}

	/// <summary>
	/// Constructor.
	/// </summary>
	public ShootingStarStrategy()
	{
		_shadowToBodyRatio = Param(nameof(ShadowToBodyRatio), 2.0m)
			.SetRange(1.5m, 5.0m)
			.SetDisplay("Shadow/Body Ratio", "Min ratio of shadow to body", "Pattern");

		_maPeriod = Param(nameof(MAPeriod), 20)
			.SetGreaterThanZero()
			.SetDisplay("MA Period", "Period for SMA", "Indicators");

		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(1).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles to use", "General");

		_cooldownBars = Param(nameof(CooldownBars), 500)
			.SetRange(1, 1000)
			.SetDisplay("Cooldown Bars", "Bars to wait between trades", "General");
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		_cooldown = default;
	}

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

		_cooldown = 0;

		var sma = new SimpleMovingAverage { Length = MAPeriod };

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

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

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

		if (!IsFormedAndOnlineAndAllowTrading())
			return;

		if (_cooldown > 0)
		{
			_cooldown--;
			return;
		}

		var bodySize = Math.Abs(candle.OpenPrice - candle.ClosePrice);
		var upperShadow = candle.HighPrice - Math.Max(candle.OpenPrice, candle.ClosePrice);
		var lowerShadow = Math.Min(candle.OpenPrice, candle.ClosePrice) - candle.LowPrice;

		// Shooting star: long upper shadow, small lower shadow (bearish)
		var isShootingStar = bodySize > 0 && upperShadow > bodySize * ShadowToBodyRatio && lowerShadow < bodySize * 0.5m;
		// Hammer: long lower shadow, small upper shadow (bullish)
		var isHammer = bodySize > 0 && lowerShadow > bodySize * ShadowToBodyRatio && upperShadow < bodySize * 0.5m;

		if (Position == 0 && isShootingStar && candle.ClosePrice > smaValue)
		{
			SellMarket();
			_cooldown = CooldownBars;
		}
		else if (Position == 0 && isHammer && candle.ClosePrice < smaValue)
		{
			BuyMarket();
			_cooldown = CooldownBars;
		}
		else if (Position > 0 && candle.ClosePrice < smaValue)
		{
			SellMarket();
			_cooldown = CooldownBars;
		}
		else if (Position < 0 && candle.ClosePrice > smaValue)
		{
			BuyMarket();
			_cooldown = CooldownBars;
		}
	}
}