Michael Handschuh
fdc866fda0
We didn't experience the expected performance improvements. Locally under unit test there was aboout an order of magnitude throughput increase, but when run against the history benchmark, this new approach was 60% slower. We're reverting this for now to perform further analysis and better understand the performance profiling of the python history stack.
85 lines
3.4 KiB
Python
85 lines
3.4 KiB
Python
# QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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# Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from clr import AddReference
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AddReference("System.Core")
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AddReference("QuantConnect.Common")
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AddReference("QuantConnect.Algorithm")
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from System import *
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from QuantConnect import *
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from QuantConnect.Algorithm import QCAlgorithm
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from QuantConnect.Data.UniverseSelection import *
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### <summary>
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### Demonstration of using coarse and fine universe selection together to filter down a smaller universe of stocks.
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### </summary>
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### <meta name="tag" content="using data" />
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### <meta name="tag" content="universes" />
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### <meta name="tag" content="coarse universes" />
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### <meta name="tag" content="fine universes" />
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class CoarseFundamentalTop3Algorithm(QCAlgorithm):
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def Initialize(self):
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'''Initialise the data and resolution required, as well as the cash and start-end dates for your algorithm. All algorithms must initialized.'''
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self.SetStartDate(2014,3,24) #Set Start Date
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self.SetEndDate(2014,4,7) #Set End Date
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self.SetCash(50000) #Set Strategy Cash
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# what resolution should the data *added* to the universe be?
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self.UniverseSettings.Resolution = Resolution.Daily
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# this add universe method accepts a single parameter that is a function that
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# accepts an IEnumerable<CoarseFundamental> and returns IEnumerable<Symbol>
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self.AddUniverse(self.CoarseSelectionFunction)
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self.__numberOfSymbols = 3
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self._changes = None
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# sort the data by daily dollar volume and take the top 'NumberOfSymbols'
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def CoarseSelectionFunction(self, coarse):
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# sort descending by daily dollar volume
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sortedByDollarVolume = sorted(coarse, key=lambda x: x.DollarVolume, reverse=True)
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# return the symbol objects of the top entries from our sorted collection
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return [ x.Symbol for x in sortedByDollarVolume[:self.__numberOfSymbols] ]
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def OnData(self, data):
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self.Log(f"OnData({self.UtcTime}): Keys: {', '.join([key.Value for key in data.Keys])}")
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# if we have no changes, do nothing
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if self._changes is None: return
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# liquidate removed securities
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for security in self._changes.RemovedSecurities:
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if security.Invested:
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self.Liquidate(security.Symbol)
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# we want 1/N allocation in each security in our universe
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for security in self._changes.AddedSecurities:
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self.SetHoldings(security.Symbol, 1 / self.__numberOfSymbols)
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self._changes = None
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# this event fires whenever we have changes to our universe
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def OnSecuritiesChanged(self, changes):
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self._changes = changes
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self.Log(f"OnSecuritiesChanged({self.UtcTime}):: {changes}")
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def OnOrderEvent(self, fill):
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self.Log(f"OnOrderEvent({self.UtcTime}):: {fill}") |