Michael Handschuh
591f6b2127
Refactors existing consolidators, indicators, and helper methods to depend on IBaseData instead of BaseData. These updates also defines an IBaseDataBar to act as an abstraction point between TradeBar and QuoteBar.
92 lines
3.3 KiB
C#
92 lines
3.3 KiB
C#
/*
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* 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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*
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*/
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using QuantConnect.Data.Market;
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namespace QuantConnect.Indicators.CandlestickPatterns
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{
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/// <summary>
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/// Engulfing candlestick pattern
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/// </summary>
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/// <remarks>
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/// Must have:
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/// - first: black (white) real body
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/// - second: white(black) real body that engulfs the prior real body
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/// The returned value is positive(+1) when bullish or negative(-1) when bearish;
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/// The user should consider that an engulfing must appear in a downtrend if bullish or in an uptrend if bearish,
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/// while this function does not consider it
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/// </remarks>
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public class Engulfing : CandlestickPattern
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="Engulfing"/> class using the specified name.
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/// </summary>
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/// <param name="name">The name of this indicator</param>
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public Engulfing(string name)
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: base(name, 3)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="Engulfing"/> class.
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/// </summary>
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public Engulfing()
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: this("ENGULFING")
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{
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}
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/// <summary>
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/// Gets a flag indicating when this indicator is ready and fully initialized
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/// </summary>
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public override bool IsReady
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{
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get { return Samples >= Period; }
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}
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/// <summary>
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/// Computes the next value of this indicator from the given state
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/// </summary>
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/// <param name="window">The window of data held in this indicator</param>
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/// <param name="input">The input given to the indicator</param>
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/// <returns>A new value for this indicator</returns>
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protected override decimal ComputeNextValue(IReadOnlyWindow<IBaseDataBar> window, IBaseDataBar input)
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{
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if (!IsReady)
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{
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return 0m;
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}
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decimal value;
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if (
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// white engulfs black
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(GetCandleColor(input) == CandleColor.White && GetCandleColor(window[1]) == CandleColor.Black &&
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input.Close > window[1].Open && input.Open < window[1].Close
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)
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||
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// black engulfs white
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(GetCandleColor(input) == CandleColor.Black && GetCandleColor(window[1]) == CandleColor.White &&
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input.Open > window[1].Close && input.Close < window[1].Open
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)
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)
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value = (int)GetCandleColor(input);
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else
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value = 0;
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return value;
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}
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}
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}
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