Fly System Scalp Strategy

using System;

using Ecng.Common;

using StockSharp.Algo.Indicators;
using StockSharp.Algo.Strategies;
using StockSharp.BusinessEntities;
using StockSharp.Messages;

namespace StockSharp.Samples.Strategies;

/// <summary>
/// Fly System Scalp strategy: EMA crossover + RSI confirmation.
/// Buys when close crosses above EMA and RSI confirms.
/// Sells when close crosses below EMA and RSI confirms.
/// </summary>
public class FlySystemScalpStrategy : Strategy
{
	private readonly StrategyParam<DataType> _candleType;
	private readonly StrategyParam<int> _emaPeriod;
	private readonly StrategyParam<int> _rsiPeriod;

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

	public int EmaPeriod
	{
		get => _emaPeriod.Value;
		set => _emaPeriod.Value = value;
	}

	public int RsiPeriod
	{
		get => _rsiPeriod.Value;
		set => _rsiPeriod.Value = value;
	}

	public FlySystemScalpStrategy()
	{
		_candleType = Param(nameof(CandleType), TimeSpan.FromMinutes(30).TimeFrame())
			.SetDisplay("Candle Type", "Candle timeframe", "General");

		_emaPeriod = Param(nameof(EmaPeriod), 20)
			.SetGreaterThanZero()
			.SetDisplay("EMA Period", "EMA period", "Indicators");

		_rsiPeriod = Param(nameof(RsiPeriod), 14)
			.SetGreaterThanZero()
			.SetDisplay("RSI Period", "RSI period", "Indicators");
	}

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

		var ema = new ExponentialMovingAverage { Length = EmaPeriod };
		var rsi = new RelativeStrengthIndex { Length = RsiPeriod };

		decimal? prevClose = null;
		decimal? prevEma = null;

		var subscription = SubscribeCandles(CandleType);
		subscription
			.Bind(ema, rsi, (candle, emaVal, rsiVal) =>
			{
				if (candle.State != CandleStates.Finished)
					return;

				if (!IsFormedAndOnlineAndAllowTrading())
					return;

				var close = candle.ClosePrice;

				if (prevClose.HasValue && prevEma.HasValue)
				{
					var crossUp = prevClose.Value <= prevEma.Value && close > emaVal;
					var crossDown = prevClose.Value >= prevEma.Value && close < emaVal;

					if (crossUp && rsiVal < 55m && Position <= 0)
						BuyMarket();
					else if (crossDown && rsiVal > 45m && Position >= 0)
						SellMarket();
				}

				prevClose = close;
				prevEma = emaVal;
			})
			.Start();

		var area = CreateChartArea();
		if (area != null)
		{
			DrawCandles(area, subscription);
			DrawIndicator(area, ema);
			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, RelativeStrengthIndex
from StockSharp.Algo.Strategies import Strategy

class fly_system_scalp_strategy(Strategy):
    """
    Fly System Scalp: EMA crossover + RSI confirmation.
    Buys when close crosses above EMA and RSI < 55.
    Sells when close crosses below EMA and RSI > 45.
    """

    def __init__(self):
        super(fly_system_scalp_strategy, self).__init__()
        self._candle_type = self.Param("CandleType", DataType.TimeFrame(TimeSpan.FromMinutes(30))) \
            .SetDisplay("Candle Type", "Candle timeframe", "General")
        self._ema_period = self.Param("EmaPeriod", 20) \
            .SetDisplay("EMA Period", "EMA period", "Indicators")
        self._rsi_period = self.Param("RsiPeriod", 14) \
            .SetDisplay("RSI Period", "RSI period", "Indicators")

        self._prev_close = None
        self._prev_ema = None

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

    def OnReseted(self):
        super(fly_system_scalp_strategy, self).OnReseted()
        self._prev_close = None
        self._prev_ema = None

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

        ema = ExponentialMovingAverage()
        ema.Length = self._ema_period.Value
        rsi = RelativeStrengthIndex()
        rsi.Length = self._rsi_period.Value

        subscription = self.SubscribeCandles(self.candle_type)
        subscription.Bind(ema, rsi, self._process_candle).Start()

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

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

        close = float(candle.ClosePrice)
        ema = float(ema_val)
        rsi = float(rsi_val)

        if self._prev_close is not None and self._prev_ema is not None:
            cross_up = self._prev_close <= self._prev_ema and close > ema
            cross_down = self._prev_close >= self._prev_ema and close < ema

            if cross_up and rsi < 55 and self.Position <= 0:
                self.BuyMarket()
            elif cross_down and rsi > 45 and self.Position >= 0:
                self.SellMarket()

        self._prev_close = close
        self._prev_ema = ema

    def CreateClone(self):
        return fly_system_scalp_strategy()