Estrategia MT45

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;

using StockSharp.Algo;

namespace StockSharp.Samples.Strategies;

/// <summary>
/// Alternating long/short strategy converted from the original MT45 MQL expert.
/// </summary>
public class MT45Strategy : Strategy
{
	private readonly StrategyParam<decimal> _stopPoints;
	private readonly StrategyParam<decimal> _takePoints;
	private readonly StrategyParam<decimal> _baseVolume;
	private readonly StrategyParam<decimal> _multiplier;
	private readonly StrategyParam<decimal> _maxVolume;
	private readonly StrategyParam<DataType> _candleType;

	private Sides _nextSide;
	private Sides? _pendingSide;
	private bool _entryPending;
	private decimal _entryPrice;
	private decimal _lastTradeVolume;
	private decimal _nextVolume;
	private decimal _prevPosition;
	private decimal _pointValue;

	/// <summary>
	/// Stop-loss distance expressed in price steps.
	/// </summary>
	public decimal StopPoints
	{
		get => _stopPoints.Value;
		set => _stopPoints.Value = value;
	}

	/// <summary>
	/// Take-profit distance expressed in price steps.
	/// </summary>
	public decimal TakePoints
	{
		get => _takePoints.Value;
		set => _takePoints.Value = value;
	}

	/// <summary>
	/// Base trading volume used after profitable trades.
	/// </summary>
	public decimal BaseVolume
	{
		get => _baseVolume.Value;
		set => _baseVolume.Value = value;
	}

	/// <summary>
	/// Multiplier applied to the next volume after a losing trade.
	/// </summary>
	public decimal MartingaleMultiplier
	{
		get => _multiplier.Value;
		set => _multiplier.Value = value;
	}

	/// <summary>
	/// Maximum allowed trading volume.
	/// </summary>
	public decimal MaxVolume
	{
		get => _maxVolume.Value;
		set => _maxVolume.Value = value;
	}

	/// <summary>
	/// Candle type used to detect new bars.
	/// </summary>
	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	public MT45Strategy()
	{
		_stopPoints = Param(nameof(StopPoints), 600m)
			.SetDisplay("Stop Points", "Distance to stop loss measured in price steps", "Risk")
			
			.SetOptimize(100m, 1500m, 50m);

		_takePoints = Param(nameof(TakePoints), 700m)
			.SetDisplay("Take Points", "Distance to take profit measured in price steps", "Risk")
			
			.SetOptimize(100m, 2000m, 50m);

		_baseVolume = Param(nameof(BaseVolume), 1m)
			.SetDisplay("Base Volume", "Initial trade volume used by the strategy", "Trading");

		_multiplier = Param(nameof(MartingaleMultiplier), 2m)
			.SetDisplay("Martingale Multiplier", "Volume multiplier applied after a losing trade", "Trading")
			
			.SetOptimize(1m, 5m, 0.5m);

		_maxVolume = Param(nameof(MaxVolume), 10m)
			.SetDisplay("Max Volume", "Upper limit for martingale scaling", "Trading");

		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
			.SetDisplay("Candle Type", "Candle series used to trigger new trades", "General");

		_nextSide = Sides.Buy;
		_nextVolume = BaseVolume;
		_lastTradeVolume = BaseVolume;
		Volume = BaseVolume;
	}

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

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

		_nextSide = Sides.Buy;
		_pendingSide = null;
		_entryPending = false;
		_entryPrice = 0m;
		_lastTradeVolume = BaseVolume;
		_nextVolume = BaseVolume;
		_prevPosition = 0m;
		_pointValue = 0m;
		Volume = BaseVolume;
	}

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

		_pointValue = Security?.PriceStep ?? 1m;
		Volume = BaseVolume;

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

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

		StartProtection(
			takeProfit: CreatePriceUnit(TakePoints),
			stopLoss: CreatePriceUnit(StopPoints));
	}

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

		if (_entryPending || Position != 0)
			return;

		var volume = _nextVolume;
		if (volume <= 0m)
			return;

		var side = _nextSide;
		_pendingSide = side;

		// Alternate between long and short trades every finished bar.
		if (side == Sides.Buy)
		{
			BuyMarket();
		}
		else
		{
			SellMarket();
		}

		_entryPending = true;
	}

	/// <inheritdoc />
	protected override void OnOwnTradeReceived(MyTrade trade)
	{
		base.OnOwnTradeReceived(trade);

		if (trade.Order == null || trade.Trade == null)
			return;

		var newPosition = Position;
		var previousPosition = _prevPosition;
		_prevPosition = newPosition;

		if (previousPosition == 0m && newPosition != 0m)
		{
			// Store entry price and volume for later profit calculation.
			_entryPrice = trade.Trade.Price;
			_lastTradeVolume = Math.Abs(newPosition);
			_entryPending = false;

			if (_pendingSide.HasValue)
			{
				_nextSide = Opposite(_pendingSide.Value);
				_pendingSide = null;
			}
		}
		else if (previousPosition != 0m && newPosition == 0m)
		{
			// Position closed: evaluate the result and adjust the next volume.
			var direction = previousPosition > 0m ? Sides.Buy : Sides.Sell;
			UpdateNextVolume(direction, trade.Trade.Price, Math.Abs(previousPosition));
			_entryPrice = 0m;
			_entryPending = false;
		}
	}

	private void UpdateNextVolume(Sides direction, decimal exitPrice, decimal volume)
	{
		if (volume <= 0m)
			return;

		var profit = direction == Sides.Buy
			? (exitPrice - _entryPrice) * volume
			: (_entryPrice - exitPrice) * volume;

		if (profit < 0m)
		{
			var scaled = _lastTradeVolume * MartingaleMultiplier;
			_nextVolume = scaled > MaxVolume ? BaseVolume : scaled;
		}
		else
		{
			_nextVolume = BaseVolume;
		}

		Volume = _nextVolume;
	}

	private Unit CreatePriceUnit(decimal points)
	{
		if (points <= 0m || _pointValue <= 0m)
			return default;

		return new Unit(points * _pointValue, UnitTypes.Absolute);
	}

	private static Sides Opposite(Sides side)
	{
		return side == Sides.Buy ? Sides.Sell : Sides.Buy;
	}
}

import clr

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

from System import TimeSpan, Decimal, Math as CMath

from StockSharp.Messages import DataType, CandleStates, Sides, Unit, UnitTypes
from StockSharp.Algo.Strategies import Strategy


class mt45_strategy(Strategy):
    def __init__(self):
        super(mt45_strategy, self).__init__()

        self._stop_points = self.Param("StopPoints", Decimal(600))
        self._take_points = self.Param("TakePoints", Decimal(700))
        self._base_volume = self.Param("BaseVolume", Decimal(1))
        self._multiplier = self.Param("MartingaleMultiplier", Decimal(2))
        self._max_volume = self.Param("MaxVolume", Decimal(10))
        self._candle_type = self.Param("CandleType", DataType.TimeFrame(TimeSpan.FromHours(4)))

        self._next_side = Sides.Buy
        self._pending_side = None
        self._entry_pending = False
        self._entry_price = Decimal(0)
        self._last_trade_volume = Decimal(1)
        self._next_volume = Decimal(1)
        self._prev_position = Decimal(0)
        self._point_value = Decimal(0)
        self.Volume = Decimal(1)

    @property
    def StopPoints(self):
        return self._stop_points.Value

    @property
    def TakePoints(self):
        return self._take_points.Value

    @property
    def BaseVolume(self):
        return self._base_volume.Value

    @property
    def MartingaleMultiplier(self):
        return self._multiplier.Value

    @property
    def MaxVolume(self):
        return self._max_volume.Value

    @property
    def CandleType(self):
        return self._candle_type.Value

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

    def OnStarted2(self, time):
        super(mt45_strategy, self).OnStarted2(time)

        sec = self.Security
        self._point_value = sec.PriceStep if sec is not None and sec.PriceStep is not None else Decimal(1)
        self.Volume = self.BaseVolume

        subscription = self.SubscribeCandles(self.CandleType)
        subscription.Bind(self._process_candle).Start()

        area = self.CreateChartArea()
        if area is not None:
            self.DrawCandles(area, subscription)
            self.DrawOwnTrades(area)

        tp = self._create_price_unit(self.TakePoints)
        sl = self._create_price_unit(self.StopPoints)
        if tp is not None and sl is not None:
            self.StartProtection(tp, sl)

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

        if self._entry_pending or self.Position != Decimal(0):
            return

        volume = self._next_volume
        if volume <= Decimal(0):
            return

        side = self._next_side
        self._pending_side = side

        if side == Sides.Buy:
            self.BuyMarket()
        else:
            self.SellMarket()

        self._entry_pending = True

    def OnOwnTradeReceived(self, trade):
        super(mt45_strategy, self).OnOwnTradeReceived(trade)

        if trade.Order is None or trade.Trade is None:
            return

        new_position = self.Position
        previous_position = self._prev_position
        self._prev_position = new_position

        if previous_position == Decimal(0) and new_position != Decimal(0):
            self._entry_price = trade.Trade.Price
            self._last_trade_volume = CMath.Abs(new_position)
            self._entry_pending = False

            if self._pending_side is not None:
                self._next_side = Sides.Sell if self._pending_side == Sides.Buy else Sides.Buy
                self._pending_side = None

        elif previous_position != Decimal(0) and new_position == Decimal(0):
            direction = Sides.Buy if previous_position > Decimal(0) else Sides.Sell
            self._update_next_volume(direction, trade.Trade.Price, CMath.Abs(previous_position))
            self._entry_price = Decimal(0)
            self._entry_pending = False

    def _update_next_volume(self, direction, exit_price, volume):
        if volume <= Decimal(0):
            return

        if direction == Sides.Buy:
            profit = (exit_price - self._entry_price) * volume
        else:
            profit = (self._entry_price - exit_price) * volume

        if profit < Decimal(0):
            scaled = self._last_trade_volume * self.MartingaleMultiplier
            self._next_volume = self.BaseVolume if scaled > self.MaxVolume else scaled
        else:
            self._next_volume = self.BaseVolume

        self.Volume = self._next_volume

    def _create_price_unit(self, points):
        if points <= Decimal(0) or self._point_value <= Decimal(0):
            return None
        return Unit(points * self._point_value, UnitTypes.Absolute)

    def OnReseted(self):
        super(mt45_strategy, self).OnReseted()
        self._next_side = Sides.Buy
        self._pending_side = None
        self._entry_pending = False
        self._entry_price = Decimal(0)
        self._last_trade_volume = self.BaseVolume
        self._next_volume = self.BaseVolume
        self._prev_position = Decimal(0)
        self._point_value = Decimal(0)
        self.Volume = self.BaseVolume

    def CreateClone(self):
        return mt45_strategy()