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平衡力量策略

平衡力量策略通过比较收盘价与价格区间来衡量多空力量。当该值突破正阈值时，表示买方力量强劲。

当平衡力量上穿设定的 Threshold 时，策略做多；当指标跌破负阈值时平仓。

细节

  • 入场条件：
    • 平衡力量上穿 Threshold。
  • 多空方向：仅做多。
  • 离场条件：
    • 平衡力量跌破 -Threshold。
  • 止损：无。
  • 默认值：
    • Threshold = 0.8
  • 过滤器：
    • 类别：动量
    • 方向：多头
    • 指标：Balance of Power
    • 止损：无
    • 复杂度：低
    • 时间周期：任意
    • 季节性：否
    • 神经网络：否
    • 背离：否
    • 风险等级：中
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>
/// Balance of Power strategy.
/// Uses EMA crossover with RSI filter and cooldown.
/// </summary>
public class BalanceOfPowerStrategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _fastEmaLength;
	private readonly StrategyParam<int> _slowEmaLength;
	private readonly StrategyParam<int> _cooldownBars;

	private decimal _prevFast;
	private decimal _prevSlow;
	private int _barIndex;
	private int _lastTradeBar;

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

	/// <summary>
	/// Fast EMA period.
	/// </summary>
	public int FastEmaLength
	{
		get => _fastEmaLength.Value;
		set => _fastEmaLength.Value = value;
	}

	/// <summary>
	/// Slow EMA period.
	/// </summary>
	public int SlowEmaLength
	{
		get => _slowEmaLength.Value;
		set => _slowEmaLength.Value = value;
	}

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

	/// <summary>
	/// Constructor.
	/// </summary>
	public BalanceOfPowerStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(1).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles to use", "General");

		_fastEmaLength = Param(nameof(FastEmaLength), 12)
			.SetGreaterThanZero()
			.SetDisplay("Fast EMA", "Fast EMA period", "Indicators");

		_slowEmaLength = Param(nameof(SlowEmaLength), 40)
			.SetGreaterThanZero()
			.SetDisplay("Slow EMA", "Slow EMA period", "Indicators");

		_cooldownBars = Param(nameof(CooldownBars), 350)
			.SetDisplay("Cooldown Bars", "Bars between trades", "Trading");
	}

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

	/// <inheritdoc />
	protected override void OnReseted()
	{
		base.OnReseted();
		_prevFast = 0;
		_prevSlow = 0;
		_barIndex = 0;
		_lastTradeBar = 0;
	}

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

		var fastEma = new ExponentialMovingAverage { Length = FastEmaLength };
		var slowEma = new ExponentialMovingAverage { Length = SlowEmaLength };

		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 fastValue, decimal slowValue)
	{
		if (candle.State != CandleStates.Finished)
			return;

		_barIndex++;

		var cooldownOk = _barIndex - _lastTradeBar > CooldownBars;

		var crossUp = _prevFast > 0 && _prevFast <= _prevSlow && fastValue > slowValue;
		var crossDown = _prevFast > 0 && _prevFast >= _prevSlow && fastValue < slowValue;

		if (crossUp && Position <= 0 && cooldownOk)
		{
			BuyMarket();
			_lastTradeBar = _barIndex;
		}
		else if (crossDown && Position >= 0 && cooldownOk)
		{
			SellMarket();
			_lastTradeBar = _barIndex;
		}

		_prevFast = fastValue;
		_prevSlow = slowValue;
	}
}