Exp ColorX2MA X2 Strategy

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>
/// ColorX2MA X2 strategy (simplified). Uses dual EMA smoothing to detect trend color transitions.
/// Buys when the smoothed MA turns up, sells when it turns down.
/// </summary>
public class ExpColorX2MaX2Strategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _fastLength;
	private readonly StrategyParam<int> _slowLength;

	public DataType CandleType
	{
		get => _candleType.Value;
		set => _candleType.Value = value;
	}

	public int FastLength
	{
		get => _fastLength.Value;
		set => _fastLength.Value = value;
	}

	public int SlowLength
	{
		get => _slowLength.Value;
		set => _slowLength.Value = value;
	}

	public ExpColorX2MaX2Strategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(1).TimeFrame())
			.SetDisplay("Candle Type", "Candles", "General");

		_fastLength = Param(nameof(FastLength), 12)
			.SetGreaterThanZero()
			.SetDisplay("Fast Length", "Fast EMA period", "Indicators");

		_slowLength = Param(nameof(SlowLength), 26)
			.SetGreaterThanZero()
			.SetDisplay("Slow Length", "Slow EMA period", "Indicators");
	}

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

		var fastEma = new ExponentialMovingAverage { Length = FastLength };
		var slowEma = new ExponentialMovingAverage { Length = SlowLength };

		decimal prevFast = 0, prevSlow = 0;
		var hasPrev = false;

		var subscription = SubscribeCandles(CandleType);
		subscription
			.Bind(fastEma, slowEma, (ICandleMessage candle, decimal fastValue, decimal slowValue) =>
			{
				if (candle.State != CandleStates.Finished)
					return;

				if (!hasPrev)
				{
					prevFast = fastValue;
					prevSlow = slowValue;
					hasPrev = true;
					return;
				}

				if (!IsFormedAndOnlineAndAllowTrading())
				{
					prevFast = fastValue;
					prevSlow = slowValue;
					return;
				}

				// Fast crosses above slow
				if (prevFast <= prevSlow && fastValue > slowValue && Position <= 0)
					BuyMarket();
				// Fast crosses below slow
				else if (prevFast >= prevSlow && fastValue < slowValue && Position >= 0)
					SellMarket();

				prevFast = fastValue;
				prevSlow = slowValue;
			})
			.Start();

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

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


class exp_color_x2_ma_x2_strategy(Strategy):
    def __init__(self):
        super(exp_color_x2_ma_x2_strategy, self).__init__()

        self._candle_type = self.Param("CandleType", DataType.TimeFrame(TimeSpan.FromHours(1))) \
            .SetDisplay("Candle Type", "Candles", "General")
        self._fast_length = self.Param("FastLength", 12) \
            .SetDisplay("Fast Length", "Fast EMA period", "Indicators")
        self._slow_length = self.Param("SlowLength", 26) \
            .SetDisplay("Slow Length", "Slow EMA period", "Indicators")

        self._prev_fast = 0.0
        self._prev_slow = 0.0
        self._has_prev = False

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

    @property
    def FastLength(self):
        return self._fast_length.Value

    @property
    def SlowLength(self):
        return self._slow_length.Value

    def OnReseted(self):
        super(exp_color_x2_ma_x2_strategy, self).OnReseted()
        self._prev_fast = 0.0
        self._prev_slow = 0.0
        self._has_prev = False

    def OnStarted2(self, time):
        super(exp_color_x2_ma_x2_strategy, self).OnStarted2(time)
        self._prev_fast = 0.0
        self._prev_slow = 0.0
        self._has_prev = False

        fast_ema = ExponentialMovingAverage()
        fast_ema.Length = self.FastLength
        slow_ema = ExponentialMovingAverage()
        slow_ema.Length = self.SlowLength

        subscription = self.SubscribeCandles(self.CandleType)
        subscription.Bind(fast_ema, slow_ema, self._on_process).Start()

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

    def _on_process(self, candle, fast_value, slow_value):
        if candle.State != CandleStates.Finished:
            return
        fv = float(fast_value)
        sv = float(slow_value)
        if not self._has_prev:
            self._prev_fast = fv
            self._prev_slow = sv
            self._has_prev = True
            return
        if self._prev_fast <= self._prev_slow and fv > sv and self.Position <= 0:
            self.BuyMarket()
        elif self._prev_fast >= self._prev_slow and fv < sv and self.Position >= 0:
            self.SellMarket()
        self._prev_fast = fv
        self._prev_slow = sv

    def CreateClone(self):
        return exp_color_x2_ma_x2_strategy()