Стратегия Parabolic SAR First Dot

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>
/// Parabolic SAR first dot reversal strategy.
/// Opens a position when Parabolic SAR flips relative to the close and protects it with classic stops.
/// </summary>
public class ParabolicSarFirstDotStrategy : Strategy
{
	private readonly StrategyParam<decimal> _tradeVolume;
	private readonly StrategyParam<int> _stopLossPoints;
	private readonly StrategyParam<int> _takeProfitPoints;
	private readonly StrategyParam<bool> _useStopMultiplier;
	private readonly StrategyParam<decimal> _sarAccelerationStep;
	private readonly StrategyParam<decimal> _sarAccelerationMax;
	private readonly StrategyParam<DataType> _candleType;

	private decimal? _longStop;
	private decimal? _longTake;
	private decimal? _shortStop;
	private decimal? _shortTake;
	private bool? _prevIsSarAbovePrice;
	private decimal _priceStep;
	private DateTimeOffset _lastTradeTime;

	/// <summary>
	/// Trading volume in lots.
	/// </summary>
	public decimal TradeVolume
	{
		get => _tradeVolume.Value;
		set
		{
			_tradeVolume.Value = value;
			Volume = value;
		}
	}

	/// <summary>
	/// Stop-loss distance expressed in Parabolic SAR points.
	/// </summary>
	public int StopLossPoints
	{
		get => _stopLossPoints.Value;
		set => _stopLossPoints.Value = value;
	}

	/// <summary>
	/// Take-profit distance expressed in Parabolic SAR points.
	/// </summary>
	public int TakeProfitPoints
	{
		get => _takeProfitPoints.Value;
		set => _takeProfitPoints.Value = value;
	}

	/// <summary>
	/// Multiply stop distances by ten to mirror the MetaTrader implementation.
	/// </summary>
	public bool UseStopMultiplier
	{
		get => _useStopMultiplier.Value;
		set => _useStopMultiplier.Value = value;
	}

	/// <summary>
	/// Initial acceleration factor for Parabolic SAR.
	/// </summary>
	public decimal SarAccelerationStep
	{
		get => _sarAccelerationStep.Value;
		set => _sarAccelerationStep.Value = value;
	}

	/// <summary>
	/// Maximum acceleration factor for Parabolic SAR.
	/// </summary>
	public decimal SarAccelerationMax
	{
		get => _sarAccelerationMax.Value;
		set => _sarAccelerationMax.Value = value;
	}

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

	/// <summary>
	/// Initializes a new instance of the <see cref="ParabolicSarFirstDotStrategy"/>.
	/// </summary>
	public ParabolicSarFirstDotStrategy()
	{
		_tradeVolume = Param(nameof(TradeVolume), 0.1m)
			.SetDisplay("Volume", "Order volume in lots", "General")
			.SetGreaterThanZero();

		_stopLossPoints = Param(nameof(StopLossPoints), 90)
			.SetDisplay("Stop-Loss Points", "Stop-loss distance converted through the instrument price step", "Risk Management")
			.SetGreaterThanZero()
			
			.SetOptimize(30, 150, 10);

		_takeProfitPoints = Param(nameof(TakeProfitPoints), 20)
			.SetDisplay("Take-Profit Points", "Take-profit distance converted through the instrument price step", "Risk Management")
			.SetGreaterThanZero()
			
			.SetOptimize(10, 80, 10);

		_useStopMultiplier = Param(nameof(UseStopMultiplier), true)
			.SetDisplay("Use Stop Multiplier", "Multiply distances by ten to reproduce MetaTrader stop handling", "Risk Management");

		_sarAccelerationStep = Param(nameof(SarAccelerationStep), 0.02m)
			.SetDisplay("SAR Step", "Initial acceleration factor for Parabolic SAR", "Indicator")
			.SetRange(0.01m, 0.05m)
			
			.SetOptimize(0.01m, 0.05m, 0.01m);

		_sarAccelerationMax = Param(nameof(SarAccelerationMax), 0.2m)
			.SetDisplay("SAR Max", "Maximum acceleration factor for Parabolic SAR", "Indicator")
			.SetRange(0.1m, 0.4m)
			
			.SetOptimize(0.1m, 0.4m, 0.05m);

		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(5).TimeFrame())
			.SetDisplay("Candle Type", "Candle type used for calculations", "General");

		Volume = _tradeVolume.Value;
	}

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

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

		_prevIsSarAbovePrice = null;
		_longStop = null;
		_longTake = null;
		_shortStop = null;
		_shortTake = null;
		Volume = _tradeVolume.Value;
		_priceStep = 0;
		_lastTradeTime = default;
	}

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

		_priceStep = GetPriceStep();

		var parabolicSar = new ParabolicSar
		{
			Acceleration = SarAccelerationStep,
			AccelerationMax = SarAccelerationMax
		};

		var subscription = SubscribeCandles(CandleType);

		subscription
			.Bind(parabolicSar, ProcessCandle)
			.Start();

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

	private void ProcessCandle(ICandleMessage candle, decimal sarValue)
	{
		// Work only with completed candles to match MetaTrader logic.
		if (candle.State != CandleStates.Finished)
			return;

		// Wait for Parabolic SAR indicator to be ready.

		// Check whether existing positions should be closed by protective levels.
		CheckProtectiveLevels(candle);

		var isSarAbovePrice = sarValue > candle.ClosePrice;

		// Initialize state on the first value.
		if (_prevIsSarAbovePrice == null)
		{
			_prevIsSarAbovePrice = isSarAbovePrice;
			return;
		}

		var sarSwitchedBelow = _prevIsSarAbovePrice.Value && !isSarAbovePrice;
		var sarSwitchedAbove = !_prevIsSarAbovePrice.Value && isSarAbovePrice;

		if (sarSwitchedBelow)
			TryEnterLong(candle, sarValue);
		else if (sarSwitchedAbove)
			TryEnterShort(candle, sarValue);

		_prevIsSarAbovePrice = isSarAbovePrice;
	}

	private void TryEnterLong(ICandleMessage candle, decimal sarValue)
	{
		// Prevent duplicate long entries.
		if (Position > 0m)
			return;

		// Cooldown: at least 2 days between trades to avoid over-trading.
		if (_lastTradeTime != default && (candle.OpenTime - _lastTradeTime).TotalHours < 48)
			return;

		var volume = Volume + Math.Abs(Position);
		if (volume <= 0m)
			return;

		BuyMarket(volume);
		_lastTradeTime = candle.OpenTime;

		var entryPrice = candle.ClosePrice;
		var stopDistance = GetDistance(StopLossPoints);
		var takeDistance = GetDistance(TakeProfitPoints);

		_longStop = entryPrice - stopDistance;
		_longTake = entryPrice + takeDistance;
		_shortStop = null;
		_shortTake = null;

		LogInfo($"Long entry after SAR flip. Close={entryPrice}, SAR={sarValue}, Stop={_longStop}, Take={_longTake}");
	}

	private void TryEnterShort(ICandleMessage candle, decimal sarValue)
	{
		// Prevent duplicate short entries.
		if (Position < 0m)
			return;

		// Cooldown: at least 2 days between trades to avoid over-trading.
		if (_lastTradeTime != default && (candle.OpenTime - _lastTradeTime).TotalHours < 48)
			return;

		var volume = Volume + Math.Abs(Position);
		if (volume <= 0m)
			return;

		SellMarket(volume);
		_lastTradeTime = candle.OpenTime;

		var entryPrice = candle.ClosePrice;
		var stopDistance = GetDistance(StopLossPoints);
		var takeDistance = GetDistance(TakeProfitPoints);

		_shortStop = entryPrice + stopDistance;
		_shortTake = entryPrice - takeDistance;
		_longStop = null;
		_longTake = null;

		LogInfo($"Short entry after SAR flip. Close={entryPrice}, SAR={sarValue}, Stop={_shortStop}, Take={_shortTake}");
	}

	private void CheckProtectiveLevels(ICandleMessage candle)
	{
		var position = Position;

		if (position > 0m)
		{
			if (_longStop is decimal stop && candle.LowPrice <= stop)
			{
				SellMarket(Math.Abs(position));
				LogInfo($"Long stop-loss triggered at {stop}.");
				ResetLongTargets();
			}
			else if (_longTake is decimal take && candle.HighPrice >= take)
			{
				SellMarket(Math.Abs(position));
				LogInfo($"Long take-profit triggered at {take}.");
				ResetLongTargets();
			}
		}
		else if (position < 0m)
		{
			if (_shortStop is decimal stop && candle.HighPrice >= stop)
			{
				BuyMarket(Math.Abs(position));
				LogInfo($"Short stop-loss triggered at {stop}.");
				ResetShortTargets();
			}
			else if (_shortTake is decimal take && candle.LowPrice <= take)
			{
				BuyMarket(Math.Abs(position));
				LogInfo($"Short take-profit triggered at {take}.");
				ResetShortTargets();
			}
		}
	}

	private void ResetLongTargets()
	{
		_longStop = null;
		_longTake = null;
	}

	private void ResetShortTargets()
	{
		_shortStop = null;
		_shortTake = null;
	}

	private decimal GetDistance(int basePoints)
	{
		var multiplier = UseStopMultiplier ? 10 : 1;
		return basePoints * multiplier * _priceStep;
	}

	private decimal GetPriceStep()
	{
		// Use security price step when available, otherwise fall back to a minimal tick.
		var step = Security?.PriceStep ?? 0.0001m;
		return step > 0m ? step : 0.0001m;
	}
}

import clr

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

from System import TimeSpan, Math, Decimal
from StockSharp.Messages import DataType, CandleStates
from StockSharp.Algo.Indicators import ParabolicSar
from StockSharp.Algo.Strategies import Strategy

class parabolic_sar_first_dot_strategy(Strategy):
    def __init__(self):
        super(parabolic_sar_first_dot_strategy, self).__init__()
        self._trade_volume = self.Param("TradeVolume", 0.1).SetGreaterThanZero().SetDisplay("Volume", "Order volume in lots", "General")
        self._sl_points = self.Param("StopLossPoints", 90).SetGreaterThanZero().SetDisplay("Stop-Loss Points", "Stop-loss distance", "Risk")
        self._tp_points = self.Param("TakeProfitPoints", 20).SetGreaterThanZero().SetDisplay("Take-Profit Points", "Take-profit distance", "Risk")
        self._use_multiplier = self.Param("UseStopMultiplier", True).SetDisplay("Use Stop Multiplier", "Multiply distances by 10", "Risk")
        self._sar_step = self.Param("SarAccelerationStep", 0.02).SetDisplay("SAR Step", "Initial acceleration factor", "Indicator")
        self._sar_max = self.Param("SarAccelerationMax", 0.2).SetDisplay("SAR Max", "Maximum acceleration factor", "Indicator")
        self._candle_type = self.Param("CandleType", DataType.TimeFrame(TimeSpan.FromMinutes(5))).SetDisplay("Candle Type", "Candle type", "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(parabolic_sar_first_dot_strategy, self).OnReseted()
        self._prev_is_sar_above = None
        self._long_stop = None
        self._long_take = None
        self._short_stop = None
        self._short_take = None

    def OnStarted2(self, time):
        super(parabolic_sar_first_dot_strategy, self).OnStarted2(time)
        self._prev_is_sar_above = None
        self._long_stop = None
        self._long_take = None
        self._short_stop = None
        self._short_take = None
        self._price_step = self._get_price_step()
        self.Volume = self._trade_volume.Value

        sar = ParabolicSar()
        sar.Acceleration = self._sar_step.Value
        sar.AccelerationMax = self._sar_max.Value

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

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

    def _get_price_step(self):
        step = Decimal(0.0001)
        if self.Security is not None and self.Security.PriceStep is not None and self.Security.PriceStep > Decimal.Zero:
            step = self.Security.PriceStep
        return step

    def _get_distance(self, base_points):
        multiplier = 10 if self._use_multiplier.Value else 1
        return Decimal(base_points * multiplier) * self._price_step

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

        self._check_protective_levels(candle)

        close = float(candle.ClosePrice)
        sar_f = float(sar_value)
        is_sar_above = sar_f > close

        if self._prev_is_sar_above is None:
            self._prev_is_sar_above = is_sar_above
            return

        sar_switched_below = self._prev_is_sar_above and not is_sar_above
        sar_switched_above = not self._prev_is_sar_above and is_sar_above

        if sar_switched_below:
            self._try_enter_long(candle)
        elif sar_switched_above:
            self._try_enter_short(candle)

        self._prev_is_sar_above = is_sar_above

    def _try_enter_long(self, candle):
        if self.Position > 0:
            return
        volume = self.Volume + Math.Abs(self.Position)
        if volume <= 0:
            return
        self.BuyMarket(volume)
        entry = candle.ClosePrice
        stop_dist = self._get_distance(self._sl_points.Value)
        take_dist = self._get_distance(self._tp_points.Value)
        self._long_stop = entry - stop_dist
        self._long_take = entry + take_dist
        self._short_stop = None
        self._short_take = None

    def _try_enter_short(self, candle):
        if self.Position < 0:
            return
        volume = self.Volume + Math.Abs(self.Position)
        if volume <= 0:
            return
        self.SellMarket(volume)
        entry = candle.ClosePrice
        stop_dist = self._get_distance(self._sl_points.Value)
        take_dist = self._get_distance(self._tp_points.Value)
        self._short_stop = entry + stop_dist
        self._short_take = entry - take_dist
        self._long_stop = None
        self._long_take = None

    def _check_protective_levels(self, candle):
        if self.Position > 0:
            if self._long_stop is not None and candle.LowPrice <= self._long_stop:
                self.SellMarket(Math.Abs(self.Position))
                self._long_stop = None
                self._long_take = None
            elif self._long_take is not None and candle.HighPrice >= self._long_take:
                self.SellMarket(Math.Abs(self.Position))
                self._long_stop = None
                self._long_take = None
        elif self.Position < 0:
            if self._short_stop is not None and candle.HighPrice >= self._short_stop:
                self.BuyMarket(Math.Abs(self.Position))
                self._short_stop = None
                self._short_take = None
            elif self._short_take is not None and candle.LowPrice <= self._short_take:
                self.BuyMarket(Math.Abs(self.Position))
                self._short_stop = None
                self._short_take = None

    def CreateClone(self):
        return parabolic_sar_first_dot_strategy()