VR Moving Distance-Strategie

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>
/// VR Moving strategy converted from MetaTrader 5 expert advisor.
/// Opens positions when price deviates from a moving average by a configurable distance and scales using a multiplier.
/// </summary>
public class VrMovingDistanceStrategy : Strategy
{
	public enum MovingAverageTypes
	{
		Simple,
		Exponential,
		Smoothed,
		Weighted,
		VolumeWeighted
	}

	public enum CandlePrices
	{
		Open,
		High,
		Low,
		Close,
		Median,
		Typical,
		Weighted
	}

	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _maLength;
	private readonly StrategyParam<MovingAverageTypes> _maType;
	private readonly StrategyParam<CandlePrices> _priceSource;
	private readonly StrategyParam<decimal> _distancePips;
	private readonly StrategyParam<decimal> _takeProfitPips;
	private readonly StrategyParam<decimal> _volumeMultiplier;
	private readonly StrategyParam<decimal> _baseVolume;

	private DecimalLengthIndicator _movingAverage = null!;
	private decimal _pipSize;

	private int _longEntries;
	private int _shortEntries;
	private decimal _longHighestEntry;
	private decimal _shortLowestEntry;
	private decimal? _longEntryPrice;
	private decimal? _shortEntryPrice;

	/// <summary>
	/// Candle type used for the moving average and decision logic.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	/// <summary>
	/// Moving average length.
	/// </summary>
	public int MaLength
	{
		get => _maLength.Value;
		set => _maLength.Value = value;
	}

	/// <summary>
	/// Moving average smoothing type.
	/// </summary>
	public MovingAverageTypes MaType
	{
		get => _maType.Value;
		set => _maType.Value = value;
	}

	/// <summary>
	/// Candle price source for the moving average.
	/// </summary>
	public CandlePrices PriceSource
	{
		get => _priceSource.Value;
		set => _priceSource.Value = value;
	}

	/// <summary>
	/// Distance from the moving average in pips.
	/// </summary>
	public decimal DistancePips
	{
		get => _distancePips.Value;
		set => _distancePips.Value = value;
	}

	/// <summary>
	/// Take profit distance in pips when a single position is active.
	/// </summary>
	public decimal TakeProfitPips
	{
		get => _takeProfitPips.Value;
		set => _takeProfitPips.Value = value;
	}

	/// <summary>
	/// Volume multiplier for additional entries in the same direction.
	/// </summary>
	public decimal VolumeMultiplier
	{
		get => _volumeMultiplier.Value;
		set => _volumeMultiplier.Value = value;
	}

	/// <summary>
	/// Base order volume.
	/// </summary>
	public decimal BaseVolume
	{
		get => _baseVolume.Value;
		set => _baseVolume.Value = value;
	}

	/// <summary>
	/// Constructor.
	/// </summary>
	public VrMovingDistanceStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
			.SetDisplay("Candle Type", "Timeframe used for calculations", "General");

		_maLength = Param(nameof(MaLength), 60)
			.SetGreaterThanZero()
			.SetDisplay("MA Length", "Moving average period", "Moving Average")
			
			.SetOptimize(10, 200, 10);

		_maType = Param(nameof(MaType), MovingAverageTypes.Exponential)
			.SetDisplay("MA Type", "Moving average smoothing method", "Moving Average");

		_priceSource = Param(nameof(PriceSource), CandlePrices.Close)
			.SetDisplay("Price Source", "Price used for the moving average", "Moving Average");

		_distancePips = Param(nameof(DistancePips), 50m)
			.SetGreaterThanZero()
			.SetDisplay("Distance (pips)", "Offset from the moving average", "Trading")
			
			.SetOptimize(10m, 150m, 10m);

		_takeProfitPips = Param(nameof(TakeProfitPips), 50m)
			.SetNotNegative()
			.SetDisplay("Take Profit (pips)", "Exit distance when only one position is open", "Trading")
			
			.SetOptimize(10m, 150m, 10m);

		_volumeMultiplier = Param(nameof(VolumeMultiplier), 1m)
			.SetGreaterThanZero()
			.SetDisplay("Volume Multiplier", "Multiplier for additional entries", "Trading")
			
			.SetOptimize(1m, 3m, 0.25m);

		_baseVolume = Param(nameof(BaseVolume), 1m)
			.SetGreaterThanZero()
			.SetDisplay("Base Volume", "Volume of the initial order", "Trading");
	}

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

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

		_longEntries = 0;
		_shortEntries = 0;
		_longHighestEntry = 0m;
		_shortLowestEntry = 0m;
		_longEntryPrice = null;
		_shortEntryPrice = null;
		_pipSize = 0m;
	}

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

		UpdatePipSize();

		_movingAverage = CreateMovingAverage(MaType, MaLength, PriceSource);

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

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

	}

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

		if (!_movingAverage.IsFormed)
			return;


		var distance = DistancePips * _pipSize;
		var takeProfit = TakeProfitPips * _pipSize;

		var longTrigger = _longEntries == 0 ? maValue + distance : _longHighestEntry + distance;
		var shortTrigger = _shortEntries == 0 ? maValue - distance : _shortLowestEntry - distance;

		if (takeProfit > 0m)
		{
			// Close a single long position once the take profit level is reached.
			if (_longEntries == 1 && Position > 0 && _longEntryPrice.HasValue)
			{
				var target = _longEntryPrice.Value + takeProfit;
				if (candle.HighPrice >= target)
				{
					SellMarket(Position);
					ResetLongState();
				}
			}

			// Close a single short position once the take profit level is reached.
			if (_shortEntries == 1 && Position < 0 && _shortEntryPrice.HasValue)
			{
				var target = _shortEntryPrice.Value - takeProfit;
				if (candle.LowPrice <= target)
				{
					BuyMarket(Math.Abs(Position));
					ResetShortState();
				}
			}
		}

		var baseVolume = BaseVolume;
		if (baseVolume <= 0m)
			return;

		// Open or scale a long position when price moves sufficiently above the moving average.
		if (candle.HighPrice >= longTrigger)
		{
			ExecuteLongEntry(longTrigger);
		}
		// Open or scale a short position when price moves sufficiently below the moving average.
		else if (candle.LowPrice <= shortTrigger)
		{
			ExecuteShortEntry(shortTrigger);
		}
	}

	private void ExecuteLongEntry(decimal triggerPrice)
	{
		var volume = _longEntries == 0 ? BaseVolume : BaseVolume * VolumeMultiplier;
		if (volume <= 0m)
			return;

		var orderVolume = volume;

		// Reverse short exposure before adding new long volume.
		if (Position < 0)
		{
			orderVolume += Math.Abs(Position);
			ResetShortState();
		}

		BuyMarket(orderVolume);

		_longEntries++;
		_longHighestEntry = _longEntries == 1 ? triggerPrice : Math.Max(_longHighestEntry, triggerPrice);
		_longEntryPrice = _longEntries == 1 ? triggerPrice : null;
	}

	private void ExecuteShortEntry(decimal triggerPrice)
	{
		var volume = _shortEntries == 0 ? BaseVolume : BaseVolume * VolumeMultiplier;
		if (volume <= 0m)
			return;

		var orderVolume = volume;

		// Reverse long exposure before adding new short volume.
		if (Position > 0)
		{
			orderVolume += Position;
			ResetLongState();
		}

		SellMarket(orderVolume);

		_shortEntries++;
		_shortLowestEntry = _shortEntries == 1 ? triggerPrice : Math.Min(_shortLowestEntry, triggerPrice);
		_shortEntryPrice = _shortEntries == 1 ? triggerPrice : null;
	}

	private void ResetLongState()
	{
		_longEntries = 0;
		_longHighestEntry = 0m;
		_longEntryPrice = null;
	}

	private void ResetShortState()
	{
		_shortEntries = 0;
		_shortLowestEntry = 0m;
		_shortEntryPrice = null;
	}

	private void UpdatePipSize()
	{
		var step = Security?.PriceStep ?? 1m;
		if (step <= 0m)
			step = 1m;

		var digits = GetDecimalDigits(step);
		_pipSize = (digits == 3 || digits == 5) ? step * 10m : step;
	}

	private static int GetDecimalDigits(decimal value)
	{
		value = Math.Abs(value);
		var digits = 0;
		while (value != Math.Truncate(value) && digits < 10)
		{
			value *= 10m;
			digits++;
		}

		return digits;
	}

	private static DecimalLengthIndicator CreateMovingAverage(MovingAverageTypes type, int length, CandlePrices priceSource)
	{
		DecimalLengthIndicator indicator = type switch
		{
			MovingAverageTypes.Simple => new SimpleMovingAverage(),
			MovingAverageTypes.Exponential => new ExponentialMovingAverage(),
			MovingAverageTypes.Smoothed => new SmoothedMovingAverage(),
			MovingAverageTypes.Weighted => new WeightedMovingAverage(),
			_ => new SimpleMovingAverage(),
		};

		indicator.Length = length;
		return indicator;
	}
}

import clr

clr.AddReference("StockSharp.Messages")
clr.AddReference("StockSharp.Algo")
clr.AddReference("StockSharp.Algo.Indicators")
clr.AddReference("StockSharp.Algo.Strategies")

from System import TimeSpan
from StockSharp.Messages import DataType, CandleStates
from StockSharp.Algo.Indicators import ExponentialMovingAverage
from StockSharp.Algo.Strategies import Strategy
from datatype_extensions import *
from indicator_extensions import *

class vr_moving_distance_strategy(Strategy):
    """Opens positions when price deviates from MA by distance; scales with multiplier."""
    def __init__(self):
        super(vr_moving_distance_strategy, self).__init__()
        self._ma_length = self.Param("MaLength", 60).SetGreaterThanZero().SetDisplay("MA Length", "Moving average period", "Moving Average")
        self._distance = self.Param("DistancePips", 50).SetGreaterThanZero().SetDisplay("Distance", "Offset from MA in pips", "Trading")
        self._tp = self.Param("TakeProfitPips", 50).SetNotNegative().SetDisplay("Take Profit", "TP in pips", "Trading")
        self._vol_mult = self.Param("VolumeMultiplier", 1).SetGreaterThanZero().SetDisplay("Volume Multiplier", "Multiplier for additional entries", "Trading")
        self._candle_type = self.Param("CandleType", DataType.TimeFrame(TimeSpan.FromHours(4))).SetDisplay("Candle Type", "Timeframe", "General")

    @property
    def CandleType(self): return self._candle_type.Value
    @CandleType.setter
    def CandleType(self, value): self._candle_type.Value = value

    def OnReseted(self):
        super(vr_moving_distance_strategy, self).OnReseted()
        self._long_entries = 0
        self._short_entries = 0
        self._long_highest = 0
        self._short_lowest = 0
        self._long_entry_price = None
        self._short_entry_price = None

    def OnStarted2(self, time):
        super(vr_moving_distance_strategy, self).OnStarted2(time)
        self._long_entries = 0
        self._short_entries = 0
        self._long_highest = 0
        self._short_lowest = 0
        self._long_entry_price = None
        self._short_entry_price = None

        ma = ExponentialMovingAverage()
        ma.Length = self._ma_length.Value

        sub = self.SubscribeCandles(self.CandleType)
        sub.Bind(ma, self.OnProcess).Start()

        area = self.CreateChartArea()
        if area is not None:
            self.DrawCandles(area, sub)
            self.DrawIndicator(area, ma)
            self.DrawOwnTrades(area)

    def OnProcess(self, candle, ma_val):
        if candle.State != CandleStates.Finished:
            return

        mv = float(ma_val)
        high = float(candle.HighPrice)
        low = float(candle.LowPrice)
        close = float(candle.ClosePrice)
        dist = self._distance.Value
        tp = self._tp.Value

        long_trigger = mv + dist if self._long_entries == 0 else self._long_highest + dist
        short_trigger = mv - dist if self._short_entries == 0 else self._short_lowest - dist

        # TP for single long
        if tp > 0 and self._long_entries == 1 and self.Position > 0 and self._long_entry_price is not None:
            target = self._long_entry_price + tp
            if high >= target:
                self.SellMarket()
                self._long_entries = 0
                self._long_highest = 0
                self._long_entry_price = None

        # TP for single short
        if tp > 0 and self._short_entries == 1 and self.Position < 0 and self._short_entry_price is not None:
            target = self._short_entry_price - tp
            if low <= target:
                self.BuyMarket()
                self._short_entries = 0
                self._short_lowest = 0
                self._short_entry_price = None

        # Long entry
        if high >= long_trigger:
            if self.Position < 0:
                self.BuyMarket()
                self._short_entries = 0
                self._short_lowest = 0
                self._short_entry_price = None
            self.BuyMarket()
            self._long_entries += 1
            self._long_highest = long_trigger if self._long_entries == 1 else max(self._long_highest, long_trigger)
            self._long_entry_price = long_trigger if self._long_entries == 1 else None
        elif low <= short_trigger:
            if self.Position > 0:
                self.SellMarket()
                self._long_entries = 0
                self._long_highest = 0
                self._long_entry_price = None
            self.SellMarket()
            self._short_entries += 1
            self._short_lowest = short_trigger if self._short_entries == 1 else min(self._short_lowest, short_trigger)
            self._short_entry_price = short_trigger if self._short_entries == 1 else None

    def CreateClone(self):
        return vr_moving_distance_strategy()