Requesting Data

public class BasicOptionAlgorithm : QCAlgorithm
{
    private Symbol _underlying, _contractSymbol;
    public override void Initialize()
    {
        SetStartDate(2024, 1, 1);
        _underlying = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;
    }

    public override void OnData(Slice data)
    {
        if (_contractSymbol != null)
        {
            return;
        }
        var chain = OptionChain(_underlying);
        var expiry = chain.Select(contract => contract.Expiry).Min();
        _contractSymbol = chain
            .Where(contract => 
                contract.Expiry == expiry && 
                contract.Right == OptionRight.Call &&
                contract.Greeks.Delta > 0.3m && 
                contract.Greeks.Delta < 0.7m
            )
            .OrderByDescending(contract => contract.OpenInterest)
            .First()
            .Symbol;
        AddOptionContract(_contractSymbol);
    }
}

class BasicOptionAlgorithm(QCAlgorithm):

    def initialize(self):
        self.set_start_date(2024, 1, 1)
        self._underlying = self.add_equity('SPY', data_normalization_mode=DataNormalizationMode.RAW).symbol
        self._contract_symbol = None

    def on_data(self, data):
        if self._contract_symbol:
            return
        chain = self.option_chain(self._underlying, flatten=True).data_frame
        expiry = chain.expiry.min()
        self._contract_symbol = chain[
            (chain.expiry == expiry) &
            (chain.right == OptionRight.CALL) &
            (chain.delta < 0.7) &
            (chain.delta > 0.3)
        ].sort_values('openinterest').index[-1]
        self.add_option_contract(self._contract_symbol)

_underlying = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;

self._underlying = self.add_equity("SPY", data_normalization_mode=DataNormalizationMode.RAW).symbol

UniverseSettings.DataNormalizationMode = DataNormalizationMode.Raw;

self.universe_settings.data_normalization_mode = DataNormalizationMode.RAW

// Get the contracts available to trade.
var chain = OptionChain(_underlying);

// Select a contract.
var expiry = chain.Select(contract => contract.Expiry).Min();
_contractSymbol = chain
    .Where(contract => 
        // Select call contracts with the closest expiry.
        contract.Expiry == expiry && 
        contract.Right == OptionRight.Call &&
        // Select contracts with a 0.3-0.7 delta.
        contract.Greeks.Delta > 0.3m && 
        contract.Greeks.Delta < 0.7m
    )
    // Select the contract with the largest open interest.
    .OrderByDescending(contract => contract.OpenInterest)
    .First()
    // Get the Symbol of the target contract.
    .Symbol;

# Get the contracts available to trade (in DataFrame format).
chain = self.option_chain(self._underlying, flatten=True).data_frame

# Select a contract.
expiry = chain.expiry.min()
self._contract_symbol = chain[
    # Select call contracts with the closest expiry.
    (chain.expiry == expiry) & 
    (chain.right == OptionRight.CALL) &
    # Select contracts with a 0.3-0.7 delta.
    (chain.delta > 0.3) &
    (chain.delta < 0.7)
    # Select the contract with the largest open interest.
].sort_values('openinterest').index[-1]

var option = AddOptionContract(_contractSymbol);
option.PriceModel = OptionPriceModels.BinomialCoxRossRubinstein();

option = self.add_option_contract(self._contract_symbol)
option.price_model = OptionPriceModels.binomial_cox_ross_rubinstein()

var seeder = new FuncSecuritySeeder(GetLastKnownPrices);
SetSecurityInitializer(new BrokerageModelSecurityInitializer(BrokerageModel, seeder));

seeder = FuncSecuritySeeder(self.get_last_known_prices)
self.set_security_initializer(BrokerageModelSecurityInitializer(self.brokerage_model, seeder))

AddOptionContract(_contractSymbol, Resolution.Minute);

self.add_option_contract(self._contract_symbol, Resolution.MINUTE)

AddOptionContract(_contractSymbol, fillForward: false);

self.add_option_contract(self._contract_symbol, fill_forward=False)

AddOptionContract(_contractSymbol, extendedMarketHours: true);

self.add_option_contract(self._contract_symbol, extended_market_hours=True)

RemoveOptionContract(_contractSymbol);

self.remove_option_contract(self._contract_symbol)

var option = Securities[_contractSymbol];
var underlying = Securities[_contractSymbol.Underlying];
var underlyingPrice = underlying.Price;

option = self.securities[self._contract_symbol]
underlying = self.securities[self._contract_symbol.underlying]
underlying_price = underlying.price

var payOff = option.GetPayOff(underlyingPrice);

pay_off = option.get_pay_off(underlying_price)

var intrinsicValue = option.GetIntrinsicValue(underlyingPrice);

intrinsic_value = option.get_intrinsic_value(underlying_price)

var otmAmount = option.OutOfTheMoneyAmount(underlyingPrice);

otm_amount = option.out_of_the_money_amount(underlying_price)

var isAutoExercised = option.IsAutoExercised(underlyingPrice);

is_auto_exercised = option.is_auto_exercised(underlying_price)

_underlying = QuantConnect.Symbol.Create("SPY", SecurityType.Equity, Market.USA);

self._underlying = Symbol.create("SPY", SecurityType.EQUITY, Market.USA)

_contractSymbol = QuantConnect.Symbol.CreateOption(_underlying, Market.USA,
    OptionStyle.American, OptionRight.Call, 365, new DateTime(2022, 6, 17));

self._contract_symbol = Symbol.create_option(self._underlying, Market.USA,
    OptionStyle.AMERICAN, OptionRight.CALL, 365, datetime(2022, 6, 17))

public class EquityOptionExampleAlgorithm : QCAlgorithm
{
    private Symbol _aapl;
    private List<Symbol> _options = new();
    
    public override void Initialize()
    {
        // Seed the security price to ensure the retrieval of the ATM calls at the initial filtering.
        SetSecurityInitializer(new BrokerageModelSecurityInitializer(BrokerageModel, new FuncSecuritySeeder(GetLastKnownPrices)));
        // Set the data normalization mode as raw for option strike-price comparability.
        _aapl = AddEquity("AAPL", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;
    
        // Filter an updated option list at market open everyday by a scheduled event.
        Schedule.On(
            DateRules.EveryDay(_aapl),
            TimeRules.AfterMarketOpen(_aapl, 0),
            RefreshOptionList
        );
    }
    
    private void RefreshOptionList()
    {
        // Get all tradable option contracts for AAPL at the current time for filtering.
        var contractSymbols = OptionChain(_aapl);
        // Select the calls expires within 30 days and within $5 strike from ATM as leg of the covered call.
        // $5 buffer is given on selecting the ATM call due to price movement.
        _options = contractSymbols
            .Where(symbol => 
                symbol.ID.Date < Time.AddDays(30) && 
                symbol.ID.OptionRight == OptionRight.Call && 
                Math.Abs(symbol.ID.StrikePrice - Securities[_aapl].Price) <= 5
            )
            .Select(symbol => AddOptionContract(symbol).Symbol)
            .ToList();
    }
    
    public override void OnData(Slice slice)
    {
        if (!Portfolio.Invested && slice.Bars.ContainsKey(_aapl) && _options.Count > 0)
        {
            // To form a covered call, get the contract closest to ATM and expiry.
            var contract = _options.OrderBy(x => x.ID.Date)
                .ThenBy(x => Math.Abs(x.ID.StrikePrice - slice.Bars[_aapl].Price))
                .First();
    
            // Covered call involves shorting 1 ATM call and ordering 1 lot of underlying.
            MarketOrder(contract, -1);
            MarketOrder(_aapl, Securities[contract].SymbolProperties.ContractMultiplier);
        }
    }
    
    public override void OnOrderEvent(OrderEvent orderEvent)
    {
        // Close AAPL position if the short call is not exercised (OTM).
        // If it is exercised, the underlying will be used to settle the contract automatically.
        if (orderEvent.Ticket.OrderType == OrderType.OptionExercise &&
            !orderEvent.IsInTheMoney)
        {
            MarketOrder(_aapl, -Securities[orderEvent.Symbol].SymbolProperties.ContractMultiplier);
        }
    }
}

class EquityOptionExampleAlgorithm(QCAlgorithm):

    def initialize(self) -> None:
        self.set_start_date(2018, 1, 1)
        self.set_end_date(2019, 1, 1)
        self._chain = pd.DataFrame()
        # Seed the security price to ensure the retrieval of the ATM calls at the initial filtering.
        self.set_security_initializer(BrokerageModelSecurityInitializer(self.brokerage_model, FuncSecuritySeeder(self.get_last_known_prices)))
        # Set the data normalization mode as raw for option strike-price comparability.
        self.aapl = self.add_equity("AAPL", data_normalization_mode=DataNormalizationMode.RAW).symbol
        
        # Filter an updated option list at market open everyday by a scheduled event.
        self.schedule.on(
            self.date_rules.every_day(self.aapl),
            self.time_rules.at(9, 0),
            self.refresh_option_list
        )
    
    def refresh_option_list(self) -> None:
        # Get all tradable option contracts for AAPL at the current time for filtering.
        chain = self.option_chain(self.aapl, flatten=True).data_frame
        if chain.empty:
            return
        # Select the calls expires within 30 days and within $5 strike from ATM as leg of the covered call.
        # $5 buffer is given on selecting the ATM call due to price movement.
        expiry_threshold = self.time + timedelta(30)
        self._chain = chain[
            (chain.expiry < expiry_threshold) &
            (chain.right == OptionRight.CALL) &
            (abs(chain.strike - chain.underlyinglastprice) <= 5)
        ]
        for symbol in self._chain.index:
            self.add_option_contract(symbol)
    
    def on_data(self, slice: Slice) -> None:
        if not self.portfolio.invested and self.aapl in slice.bars and not self._chain.empty:
            # To form a covered call, get the contract closest to ATM and expiry.
            self._chain['abs_moneyness'] = abs(self._chain.strike - self._chain.underlyinglastprice)
            expiry = self._chain.expiry.min()
            contract = self._chain[self._chain.expiry == expiry].sort_values('abs_moneyness').index[0]
                
            # Covered call involves shorting 1 ATM call and ordering 1 lot of underlying.
            self.market_order(contract, -1)
            self.market_order(self.aapl, self.securities[contract].symbol_properties.contract_multiplier)
    
    def on_order_event(self, order_event: OrderEvent) -> None:
        # Close AAPL position if the short call is not exercised (OTM).
        # If it is exercised, the underlying will be used to settle the contract automatically.
        if order_event.ticket.order_type == OrderType.OPTION_EXERCISE \
        and not order_event.is_in_the_money:
            self.market_order(self.aapl, -self.securities[order_event.symbol].symbol_properties.contract_multiplier)

public class EquityOptionExampleAlgorithm : QCAlgorithm
{
    private Symbol _spy;
    private List<Symbol> _options = new();
    
    public override void Initialize()
    {
        // Seed the underlying security price to ensure accurate filtering for puts of $5 above/below current market price.
        SetSecurityInitializer(new BrokerageModelSecurityInitializer(BrokerageModel, new FuncSecuritySeeder(GetLastKnownPrices)));
        // Set the data normalization mode as raw for option strike-price comparability.
        _spy = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;
    
        // Filter an updated option list at market open everyday by a scheduled event.
        Schedule.On(
            DateRules.EveryDay(_spy),
            TimeRules.At(9, 0),
            RefreshOptionList
        );
    
        // Use a scheduled event to close all positions before market close.
        Schedule.On(
            DateRules.EveryDay(_spy),
            TimeRules.BeforeMarketClose(_spy, 1),
            ExitPositions
        );
    }
    
    private void RefreshOptionList()
    {
        // Get all tradable option contracts for SPY at the current time for filtering.
        var contractSymbols = OptionChain(_spy);
        // Select the 0-DTE puts by setting expiry within 1 day.
        var filteredSymbols = contractSymbols
            .Where(symbol => symbol.ID.Date < Time.AddDays(1) && symbol.ID.OptionRight == OptionRight.Put)
            .ToList();
        // Ensure at least 2 contracts available to form a put spread.
        if (filteredSymbols.Count < 2)
        {
            _options = new();
            return;
        }
        // To form a put spread, select and subscribe to put contracts $5 above and below from the current underlying price.
        var itmPut = filteredSymbols.MinBy(symbol => Math.Abs(symbol.ID.StrikePrice - Securities[_spy].Price - 5));
        var otmPut = filteredSymbols.MinBy(symbol => Math.Abs(symbol.ID.StrikePrice - Securities[_spy].Price + 5));
        _options = new List<Symbol> { AddOptionContract(itmPut).Symbol, AddOptionContract(otmPut).Symbol };
    }
    
    public override void OnData(Slice slice)
    {
        // To avoid over-trading, limit the position opening to before 3pm.
        // To ensure the put spread formed correctly, make sure at least 2 contracts selected.
        if (!Portfolio.Invested && Time.Hour < 15 &&  _options.Count == 2)
        {
            // A bull put spread involves buying a lower-strike put and selling a high-strike put
            MarketOrder(_options.MaxBy(x => x.ID.StrikePrice), -1);
            MarketOrder(_options.MinBy(x => x.ID.StrikePrice), 1);
        }
    }
    
    private void ExitPositions()
    {
        // Exit all positions before market close to avoid option assignment and overnight risk.
        Liquidate();
    }
}

class EquityOptionExampleAlgorithm(QCAlgorithm):
    def initialize(self) -> None:
        self.options = []
        # Seed the underlying security price to ensure accurate filtering for puts of $5 above/below current market price.
        self.set_security_initializer(BrokerageModelSecurityInitializer(self.brokerage_model, FuncSecuritySeeder(self.get_last_known_prices)))
        # Set the data normalization mode as raw for option strike-price comparability.
        self.spy = self.add_equity("SPY", data_normalization_mode=DataNormalizationMode.RAW).symbol
        
        # Filter an updated option list at market open everyday by a scheduled event.
        self.schedule.on(
            self.date_rules.every_day(self.spy),
            self.time_rules.at(9, 0),
            self.refresh_option_list
        )
    
        # Use a scheduled event to close all positions before market close.
        self.schedule.on(
            self.date_rules.every_day(self.spy),
            self.time_rules.before_market_close(self.spy, 1),
            self.exit_position
        )
    
    def refresh_option_list(self) -> None:
        # Get all tradable option contracts for SPY at the current time for filtering.
        contract_symbols = self.option_chain(self.spy)
        # Select the 0-DTE puts by setting expiry within 1 day.
        filtered_symbols = [symbol for symbol in contract_symbols
            if symbol.id.date < self.time + timedelta(1) and symbol.id.option_right == OptionRight.PUT]
        # Ensure at least 2 contracts available to form a put spread.
        if len(filtered_symbols) < 2:
            self.options = []
            return
            
        # To form a put spread, select and subscribe to put contracts $5 above and below from the current underlying price.
        itm_put = sorted(filtered_symbols, key=lambda symbol: abs(symbol.id.strike_price - self.securities[self.spy].price - 5))[0]
        otm_put = sorted(filtered_symbols, key=lambda symbol: abs(symbol.id.strike_price - self.securities[self.spy].price + 5))[0]
        self.options = [self.add_option_contract(itm_put).symbol, self.add_option_contract(otm_put).symbol]
    
    def on_data(self, slice: Slice) -> None:
        # To avoid over-trading, limit the position opening to before 3pm.
        # To ensure the put spread formed correctly, make sure at least 2 contracts selected.
        if not self.portfolio.invested and self.time.hour < 15 and len(self.options) == 2:
            # A bull put spread involves buying a lower-strike put and selling a high-strike put
            sorted_by_strike = sorted(self.options, key=lambda x: x.id.strike_price)
            self.market_order(sorted_by_strike[-1], -1)
            self.market_order(sorted_by_strike[0], 1)
    
    def exit_position(self) -> None:
        # Exit all positions before market close to avoid option assignment and overnight risk.
        self.liquidate()

public class EquityOptionExampleAlgorithm : QCAlgorithm
{
    private Symbol _underlying;
    private List<Option> _universe = new();
    
    public override void Initialize()
    {
        SetStartDate(2019, 1, 1);
        SetEndDate(2019, 6, 1);
        // Add the underlying asset with raw data to enable Option strike-price comparability.
        _underlying = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;        
        // Add a Scheduled Event to select the Option contracts to trade each week.
        Schedule.On(
            DateRules.WeekStart(_underlying),
            TimeRules.At(7, 30),
            AddContracts
        );
    }
    
    private void AddContracts()
    {
        _universe.Clear();
        // Get all the tradable Option contracts for SPY at the current time.
        var chain = OptionChain(_underlying);
        // Add the contracts that have the nearest expiry after 7 days and a delta >= 0.99.
        var expiryThreshold = Time.AddDays(7);
        var contracts = chain.Where(contract => contract.Expiry >= expiryThreshold);
        if (!contracts.IsNullOrEmpty())
        {
            var expiry = contracts.Select(contract => contract.Expiry).Min();
            _universe = contracts
                .Where(contract => contract.Expiry == expiry & contract.Greeks.Delta >= 0.99m)
                .Select(contract => AddOptionContract(contract.Symbol))
                .ToList();
        }
        // Plot the number of contracts in the universe.
        Plot("Universe", "Size", _universe.Count);
    }
}

class EquityOptionExampleAlgorithm(QCAlgorithm):

    def initialize(self) -> None:
        self.set_start_date(2019, 1, 1)
        self.set_end_date(2019, 6, 1)
        # Add the underlying asset with raw data to enable Option strike-price comparability.
        self._underlying = self.add_equity("SPY", data_normalization_mode=DataNormalizationMode.RAW).symbol    
        # Add a Scheduled Event to select the Option contracts to trade each week.
        self.schedule.on(
            self.date_rules.week_start(self._underlying),
            self.time_rules.at(7, 30),
            self._add_contracts
        )
    
    def _add_contracts(self) -> None:
        self._universe = []
        # Get all the tradable Option contracts for SPY at the current time.
        chain = self.option_chain(self._underlying, flatten=True).data_frame
        if not chain.empty:
            # Add the contracts that have the nearest expiry after 7 days and a delta >= 0.99.
            expiry_threshold = self.time + timedelta(7)
            expiry = chain[chain.expiry >= expiry_threshold].expiry.min()
            self._universe = [
                self.add_option_contract(symbol) 
                for symbol in chain[(chain.expiry == expiry) & (chain.delta >= 0.99)].index
            ]
        # Plot the number of contracts in the universe.
        self.plot('Universe', 'Size', len(self._universe))

public class EquityOptionExampleAlgorithm : QCAlgorithm
{
    private Symbol _spy;
    // Set OTM threshold for wheel strategy profit margin.
    private decimal _otmThreshold = 0.05m;
    
    public override void Initialize()
    {
        // Set the data normalization mode as raw for option strike-price comparability.
        _spy = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;
    }
    
    public override void OnData(Slice slice)
    {
        // To use the latest underlying price to filter the option contract, ensure the SPY in the bar data.
        // Open short put contract position only when the last wheel is completed.
        if (!Portfolio.Invested && slice.Bars.ContainsKey(_spy))
        {
            // Initiate the wheel by shorting a least-OTM put contract that the strike is below the threshold.
            var symbol = GetTargetContract(OptionRight.Put, slice.Bars[_spy].Price * (1 - _otmThreshold));
            SetHoldings(symbol, -0.2m);
        }
        // Open short call contract position only when the put is assigned (portfolio with the underlying) to close the wheel and underlying position by the call assignment.
        else if (Portfolio[_spy].Invested && slice.Bars.ContainsKey(_spy))
        {
            // Short the corresponding number of a least-OTM call contract that the strike is above the threshold.
            var symbol = GetTargetContract(OptionRight.Call, slice.Bars[_spy].Price * (1 + _otmThreshold));
            MarketOrder(symbol, -Portfolio[_spy].Quantity / Securities[_spy].SymbolProperties.ContractMultiplier);
        }
    }
    
    private Symbol GetTargetContract(OptionRight right, decimal targetPrice)
    {
        // Get all tradable option contracts for SPY at the current time for filtering.
        var contractSymbols = OptionChain(_spy).ToList();
        // Filter for the least-OTM contract that is off by the threshold to form the wheel.
        // Expiry is set to be at least 30 days to earn the time decay, which is highest in the last month.
        var expiry = contractSymbols.Where(x => x.ID.Date > Time.AddDays(30))
            .Min(x => x.ID.Date);
        var filtered = contractSymbols.Where(x =>
                x.ID.Date == expiry &&
                x.ID.OptionRight == right &&
                (right == OptionRight.Call ? x.ID.StrikePrice >= targetPrice : x.ID.StrikePrice <= targetPrice)
            )
            .OrderBy(x => x.ID.StrikePrice)
            .ToList();
        var selected = right == OptionRight.Call ? filtered.First() : filtered.Last();
        // Request the selected contract data for trading.
        return AddOptionContract(selected).Symbol;
    }
}

class EquityOptionExampleAlgorithm(QCAlgorithm):
    def initialize(self) -> None:
        # Set the data normalization mode as raw for option strike-price comparability.
        self.spy = self.add_equity("SPY", data_normalization_mode=DataNormalizationMode.RAW).symbol
        # Set OTM threshold for wheel strategy profit margin.
        self.otm_threshold = 0.05
    
    def on_data(self, slice: Slice) -> None:
        # To use the latest underlying price to filter the option contract, ensure the SPY in the bar data.
        # Open short put contract position only when the last wheel is completed.
        if not self.portfolio.invested and self.spy in slice.bars:
            # Initiate the wheel by shorting a least-OTM put contract that the strike is below the threshold.
            symbol = self.get_target_contract(OptionRight.PUT, slice.bars[self.spy].price * (1 - self.otm_threshold))
            self.set_holdings(symbol, -0.2)
        # Open short call contract position only when the put is assigned (portfolio with the underlying) to close the wheel and underlying position by the call assignment.
        elif self.portfolio[self.spy].invested and self.spy in slice.bars:
            # Short the corresponding number of a least-OTM call contract that the strike is above the threshold.
            symbol = self.get_target_contract(OptionRight.CALL, slice.bars[self.spy].price * (1 + self.otm_threshold))
            self.market_order(symbol, self.portfolio[self.spy].quantity / self.securities[self.spy].symbol_properties.contract_multipliers)
        
    def get_target_contract(self, right: OptionRight, target_price: float) -> Symbol:
        # Get all tradable option contracts for SPY at the current time for filtering.
        contract_symbols = self.option_chain(self.spy)
        # Filter for the least-OTM contract that is off by the threshold to form the wheel.
        # Expiry is set to be at least 30 days to earn the time decay, which is highest in the last month.
        expiry = min(x.id.date for x in contract_symbols)
        filtered = [x for x in contract_symbols \
            if x.id.date == expiry \
            and x.id.option_right == right \
            and (x.id.strike_price >= target_price if right == OptionRight.CALL else x.id.strike_price <= target_price)]
        sorted_by_strikes = sorted(filtered, key=lambda x: x.id.strike_price)
        selected = sorted_by_strikes[0] if right == OptionRight.CALL else sorted_by_strikes[-1]
        # Request the selected contract data for trading.
        return self.add_option_contract(selected).symbol

namespace QuantConnect.Algorithm.CSharp
{
    public class OptionChainFullExample : QCAlgorithm
    {
        private Dictionary<Symbol, OptionChainManager> _chainManager = new();
        public override void Initialize()
        {
            SetStartDate(2023, 1, 2);
            SetEndDate(2023, 1, 30);
            SetCash(100000);

            UniverseSettings.Asynchronous = true;
            UniverseSettings.MinimumTimeInUniverse = TimeSpan.Zero;
            // Seed the security price to ensure the underlying price data is ready at the initial filtering
            SetSecurityInitializer(new BrokerageModelSecurityInitializer(BrokerageModel, new FuncSecuritySeeder(GetLastKnownPrices)));
            // Set the data normalization mode as raw for option strike-price comparability
            var spy = AddEquity("SPY", dataNormalizationMode: DataNormalizationMode.Raw).Symbol;
            // Set up a OptionChainManager to filter the contracts based on latest data by request
            _chainManager[QuantConnect.Symbol.CreateCanonicalOption(spy)] = new(-10, 10, 0, 7);
            // Daily population of the available contracts to ensure the contracts are tradable
            PopulateOptionChain();
            Schedule.On(DateRules.EveryDay(spy), TimeRules.AfterMarketOpen(spy, 1), PopulateOptionChain);
            // Filter for contract in every 5 minutes interval through scheduled event
            Schedule.On(DateRules.EveryDay(spy), TimeRules.Every(TimeSpan.FromMinutes(5)), Filter);
        }
        
        private void PopulateOptionChain()
        {
            // The contract list is updated daily, so we can get it and apply
            // the expiration filter as soon as the market opens.
            foreach (var (symbol, manager) in _chainManager)
            {
                manager.SetChain(OptionChain(symbol), Time);
            }
            Filter();
        }
        
        private void Filter()
        {
            foreach (var (symbol, manager) in _chainManager)
            {
                manager.Select(this, symbol);
            }
        }
        
        public override void OnData(Slice slice)
        {
            // Iterate the saved symbol and chain manager to obtain only the contract wanted
            foreach (var (symbol, manager) in _chainManager)
            {
                if (!slice.OptionChains.TryGetValue(symbol, out var chain))
                    continue;
                // Handle option exercise and assignment on unwanted underlying position
                if (Portfolio[symbol.Underlying].Invested)
                {
                    Liquidate(symbol.Underlying);
                }

                // Buy the ATM call with nearest expiry to speculate-trade the underlying through low cost, leveraging position
                var expiry = chain.Min(x => x.Expiry);
                var atmCall = chain
                    .Where(x => x.Expiry == expiry && x.Right == OptionRight.Call && Securities[x.Symbol].IsTradable)
                    .OrderBy(x => Math.Abs(chain.Underlying.Price - x.Strike))
                    .FirstOrDefault();
                if (atmCall != null && !Portfolio[atmCall.Symbol].Invested)
                {
                    MarketOrder(atmCall.Symbol, 1);
                }
            }
        }
    }

    internal class OptionChainManager
    {
        private readonly int _minStrike;
        private readonly int _maxStrike;
        private readonly int _minExpiry;
        private readonly int _maxExpiry;
        private List<OptionContract> _chain = new();
        private readonly List<Symbol> _symbols = new();

        public OptionChainManager(int minStrike, int maxStrike, int minExpiry, int maxExpiry)
        {
            _minStrike = minStrike;
            _maxStrike = maxStrike;
            _minExpiry = minExpiry;
            _maxExpiry = maxExpiry;
        }

        public void SetChain(OptionChain chain, DateTime time)
        {
            // Expiry criteria will not affect intra-day universe filtering, so it is done in a daily basis in higher level
            _chain = chain.Where(x =>
            {
                var totalDays = (x.Expiry - time).TotalDays;
                return _minExpiry <= totalDays && totalDays <= _maxExpiry;
            }).ToList();
        }
        
        public void Select(QCAlgorithm algorithm, Symbol underlyingSymbol)
        {
            if (_chain.IsNullOrEmpty())
                return;
            if (underlyingSymbol.IsCanonical())
                underlyingSymbol = underlyingSymbol.Underlying;

            var strikes = _chain.Select(x => x.Strike).OrderBy(x => x).Distinct().ToList();
            var spot = algorithm.Securities[underlyingSymbol].Price;
            var atm = strikes.OrderBy(x => Math.Abs(spot - x)).FirstOrDefault();
            var index = strikes.IndexOf(atm);
            var minStrike = strikes[Math.Max(0, index + _minStrike)];
            var maxStrike = strikes[Math.Min(strikes.Count - 1, index + _maxStrike)];
            var symbols = _chain
                .Where(x => minStrike <= x.Strike && x.Strike <= maxStrike)
                .Select(x => x.Symbol).ToList();

            // Also remove data subscription on the contracts being filtered out to release computation resources
                foreach (var symbol in _symbols.Except(symbols).ToList())
            {
                if (algorithm.RemoveOptionContract(symbol))
                    _symbols.Remove(symbol);
            }
            foreach (var symbol in symbols.Except(_symbols).ToList())
            {
                _symbols.Add(symbol);
                algorithm.AddOptionContract(symbol);
            }
        }
    }
}

class OptionChainFullExample(QCAlgorithm):

    def initialize(self):
        self.set_start_date(2023, 1, 2)
        self.set_end_date(2023, 1, 30)
        self.set_cash(100000)

        self.universe_settings.asynchronous = True
        self.universe_settings.minimum_time_in_universe = timedelta(minutes=0)        
        # Seed the security price to ensure the underlying price data is ready at the initial filtering
        self.set_security_initializer(BrokerageModelSecurityInitializer(self.brokerage_model, FuncSecuritySeeder(self.get_last_known_prices)))
        # Set the data normalization mode as raw for option strike-price comparability
        spy = self.add_equity("SPY", data_normalization_mode=DataNormalizationMode.RAW).symbol
        # Set up a OptionChainManager to filter the contracts based on latest data by request
        self._chain_manager = {
            Symbol.create_canonical_option(spy): OptionChainManager(-10, 10, 0, 7)
        }
        # Daily population of the available contracts to ensure the contracts are tradable
        self._populate_option_chain()
        self.schedule.on(
            self.date_rules.every_day(spy), self.time_rules.after_market_open(spy, 1), self._populate_option_chain
        )
        # Filter for contract in every 5 minutes interval through scheduled event
        self.schedule.on(self.date_rules.every_day(spy), self.time_rules.every(timedelta(minutes=5)), self._filter)

    def _populate_option_chain(self):
        # The contract list is updated daily, so we can get it and apply
        # the expiration filter as soon as the market opens.
        for symbol, manager in self._chain_manager.items():
            manager.set_chain(self.option_chain(symbol), self.time)
        self._filter()

    def _filter(self):
        for symbol, manager in self._chain_manager.items():
            manager.select(self, symbol)

    def on_data(self, slice: Slice) -> None:
        # Iterate the saved symbol and chain manager to obtain only the contract wanted
        for symbol, _ in self._chain_manager.items():
            chain = slice.option_chains.get(symbol)
            if not chain: 
                continue
            expiry = min([x.expiry for x in chain])
            contracts = [
                x for x in chain 
                if x.expiry == expiry and x.right == OptionRight.CALL and self.securities[x.symbol].is_tradable
            ]
            if not contracts: 
                continue
            atm_call = sorted(contracts, key=lambda x: abs(chain.underlying.price-x.strike))[0]

            if not self.portfolio[atm_call.symbol].invested:
                self.market_order(atm_call.symbol, 1)


class OptionChainManager:
    _chain = []
    _symbols = set([])
    
    def __init__(self, min_strike, max_strike, min_expiry, max_expiry):
        self._min_strike = min_strike
        self._max_strike = max_strike
        self._min_expiry = min_expiry
        self._max_expiry = max_expiry
    
    def set_chain(self, chain: OptionChain, time: datetime) -> None:
        # Expiry criteria will not affect intra-day universe filtering, so it is done in a daily basis in higher level
        self._chain = [x for x in chain if self._min_expiry <= (x.expiry - time).days <= self._max_expiry]
    
    def select(self, algorithm: QCAlgorithm, symbol: Symbol) -> None:
        if not self._chain:
            return
        if symbol.is_canonical():
            symbol = symbol.underlying

        # Select by strike range from ATM
        strikes = sorted(set(x.strike for x in self._chain))
        spot = algorithm.securities[symbol].price
        atm = sorted(strikes, key=lambda x: abs(spot-x))[0]
        index = strikes.index(atm)
        min_strike = strikes[max(0, index + self._min_strike)]
        max_strike = strikes[min(len(strikes) - 1, index + self._max_strike)]
        symbols = set(x.symbol for x in self._chain if min_strike <= x.strike <= max_strike)
        
        # Also remove data subscription on the contracts being filtered out to release computation resources
        for symbol in self._symbols - symbols:
            if algorithm.remove_option_contract(symbol):
                self._symbols.remove(symbol)
        # Request data subscription on the newly selected contracts for trading
        for symbol in symbols - self._symbols:
            self._symbols.add(symbol)
            algorithm.add_option_contract(symbol)