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Volatility Capture RSI-Bollinger

Strategy combines dynamic Bollinger bands with an optional RSI filter to catch volatility swings.

Details

  • Entry Criteria: Price crossing adaptive Bollinger band with optional RSI confirmation.
  • Long/Short: Configurable via Direction.
  • Exit Criteria: Price crossing opposite of the trailing band.
  • Stops: No.
  • Default Values:
    • BollingerLength = 50
    • Multiplier = 2.7183m
    • UseRsi = true
    • RsiPeriod = 10
    • RsiSmaPeriod = 5
    • BoughtRangeLevel = 55m
    • SoldRangeLevel = 50m
    • Direction = TradeDirection.Both
    • CandleType = TimeSpan.FromMinutes(5)
  • Filters:
    • Category: Volatility
    • Direction: Configurable
    • Indicators: Bollinger, RSI
    • Stops: No
    • Complexity: Basic
    • Timeframe: Intraday (5m)
    • Seasonality: No
    • Neural Networks: No
    • Divergence: No
    • Risk Level: Medium
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>
/// Volatility capture strategy using RSI and Bollinger band logic.
/// Buys when price crosses above lower band with RSI confirmation.
/// Sells when price crosses below upper band.
/// </summary>
public class VolatilityCaptureRsiBollingerStrategy : Strategy
{
	private readonly StrategyParam<int> _smaLength;
	private readonly StrategyParam<decimal> _bbWidth;
	private readonly StrategyParam<int> _rsiLength;
	private readonly StrategyParam<decimal> _rsiBuy;
	private readonly StrategyParam<decimal> _rsiSell;
	private readonly StrategyParam<DataType> _candleType;

	private int _cooldown;

	public int SmaLength { get => _smaLength.Value; set => _smaLength.Value = value; }
	public decimal BbWidth { get => _bbWidth.Value; set => _bbWidth.Value = value; }
	public int RsiLength { get => _rsiLength.Value; set => _rsiLength.Value = value; }
	public decimal RsiBuy { get => _rsiBuy.Value; set => _rsiBuy.Value = value; }
	public decimal RsiSell { get => _rsiSell.Value; set => _rsiSell.Value = value; }
	public DataType CandleType { get => _candleType.Value; set => _candleType.Value = value; }

	public VolatilityCaptureRsiBollingerStrategy()
	{
		_smaLength = Param(nameof(SmaLength), 50)
			.SetGreaterThanZero()
			.SetDisplay("SMA Length", "Bollinger SMA period", "Indicators");

		_bbWidth = Param(nameof(BbWidth), 2.7m)
			.SetGreaterThanZero()
			.SetDisplay("BB Width", "Bollinger band width", "Indicators");

		_rsiLength = Param(nameof(RsiLength), 10)
			.SetGreaterThanZero()
			.SetDisplay("RSI Length", "RSI period", "Indicators");

		_rsiBuy = Param(nameof(RsiBuy), 55m)
			.SetDisplay("RSI Buy", "RSI above for buy signal", "Levels");

		_rsiSell = Param(nameof(RsiSell), 50m)
			.SetDisplay("RSI Sell", "RSI below for sell signal", "Levels");

		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(5).TimeFrame())
			.SetDisplay("Candle Type", "Type of candles", "General");
	}

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

	protected override void OnReseted()
	{
		base.OnReseted();
		_cooldown = 0;
	}

	protected override void OnStarted2(DateTime time)
	{
		base.OnStarted2(time);

		var sma = new SimpleMovingAverage { Length = SmaLength };
		var stdDev = new StandardDeviation { Length = SmaLength };
		var rsi = new RelativeStrengthIndex { Length = RsiLength };

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

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

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

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

		var lower = smaVal - BbWidth * stdVal;
		var upper = smaVal + BbWidth * stdVal;

		// Buy when price near lower band (oversold)
		if (candle.ClosePrice <= lower && rsiVal < RsiSell && Position <= 0)
		{
			BuyMarket();
			_cooldown = 50;
		}
		// Sell when price near upper band (overbought)
		else if (candle.ClosePrice >= upper && rsiVal > RsiBuy && Position >= 0)
		{
			SellMarket();
			_cooldown = 50;
		}
	}
}