- Removing unneeded `CashBook` instance to create a new `TimeSlice`
- Adding new `TimeSliceFactory`, an instance base class that will
provide methods to create a new `TimeSlice`. Will own the `DateTimeZone`
property.
- Adding new `ISecurityPrice` and `IOptionPrice` that will provide a
reduced interface for accessing price properties and methods used when
creating a new `TimeSlice`
If we pull data and on the same time step that security gets removed,
we can still get that data in OnData(Slice) even though it was removed.
This change filters out removed securities by tracking a reference to
the subscription's disposed flag. Another change was made to wait until
the end of the time step to dispose of subscriptions.
Add IDataFeed.GetSubscription(SubscriptionDataConfig)
Pipes universe data from the data feed, through TimeSlice.Create and adds
TimeSlice.UniverseData dictionary property for read access from the algo
manager, where the data will be placed onto the correct security object.
This will change the order in which we enumerate subscriptions so we don't need
to re-sort inside of TimeSlice.Create.
The way we currently build time slices requires that we receive the underlying data
before any derivative data. This change ensures that we enumerate the underlying equity
data before we process any derivative data, such as options.
Instead of tracking just the security's symbol in the cash object we're now
maintaining a reference to the actual security object. This removes the need
to worry about cash update data in the time slice create method.
This PR is an attempt to reduce contention in concurrent dictionaries, replacing method calls using full locks with lock-free equivalents:
- dictionary.Count -> dictionary.Skip(0).Count()
- dictionary.Keys -> dictionary.Select(x => x.Key)
- dictionary.Values -> dictionary.Select(x => x.Value)
The most frequent usages of these methods are: CashBook, SecurityManager, UniverseManager and indirectly, SecurityPortfolioManager.
The reasons for this update are explained very clearly in this article:
https://arbel.net/2013/02/03/best-practices-for-using-concurrentdictionary/
When creating time slices, in the option chain object the price of the underlying was set to the value of the previous time step when using AddOption and was equal to zero when using AddOptionContract.
For each time step in algorithm.OnData, these expressions are now guaranteed to have the same value:
- algorithm.Securities[underlyingSymbol]
- optionChain.Underlying.Price
- optionContract.UnderlyingLastPrice
- Added OptionStrategies class with 10 popular option strats
- Defined OptionStrategy class
- Added support for trading of option strategies in QCAlgorithm.Trading.cs
- Added several estimator interfaces to introduce QL pricing models extention points: IDividendYieldEstimator, IRiskFreeRateEstimator, IUnderlyingVolatilityEstimator provided default implementation (flat term structure)
- Added QLOptionPriceModel class that contains meat of the calculations
- Added OptionPriceModels class that exposes 12 popular option pricing models to the user: those include Black Scholes, Barone-Adesi Whaley, Bjerksund Stensland, Crank Nicolson FD, Binomial Trees and more.
- Modified Greeks class to support lazy evaluation and introduce IV
- Partially tested on live data and trading (IQFeed/IB) and backtests. Need more data for tests.
- Added IQFeed options support to toolbox: option chain universe, option symbol list, subscriptions, live prices
- Added LiveTradingDataFeed to support options live screaming
- Added IB live options trading support: trading orders, holdings, live option exercising
- Modified ISymbolMapper interface to support derivatives (options, futures)
- Fixed minor bugs with (introduced ealier) symbol changes for options
Tested with IQFeed version 5.2.4.2. IB TWS offline version 957.
This places all security subscriptions within a universes
Subscriptions generated via calls to AddSecurity are place in a UserDefinedUniverse
UserDefinedUniverse will serve up a predetermined list of symbols on a requested interval
LiveTradingDataFeed - reworked custom enumerators to use RefreshEnumerator as wrapper for rate limitting
Add dynamic data flag to config
Remove dynamic data flag from Security
Rename dynamically loaded flag to IsCustomData
Remove Security from SubscriptionDataReader ctor
This includes updating all usages of symbol as a security identifier to use the new type.
The type includes a unique field, SID, as well as the current ticker's value. This allows
for consistent addressability while also allowing the ticker to evolve over time with the
mapping changes.
Effort was made to maintain compile and runtime backwards compatibility.
Martin Molinero