chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
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+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+
+using System;
+using QuantConnect.Data;
+
+namespace QuantConnect.Indicators
+{
+    /// <summary>
+    /// KEEPING THIS INTERFACE FOR BACKWARDS COMPATIBILITY.
+    /// Represents an indicator that can receive data updates and emit events when the value of
+    /// the indicator has changed.
+    /// </summary>
+    public interface IIndicator<T> : IComparable<IIndicator<T>>, IIndicator
+        where T : IBaseData
+    {
+    }
+
+    /// <summary>
+    /// Represents an indicator that can receive data updates and emit events when the value of
+    /// the indicator has changed.
+    /// </summary>
+    public interface IIndicator : IComparable
+    {
+        /// <summary>
+        /// Event handler that fires after this indicator is updated
+        /// </summary>
+        event IndicatorUpdatedHandler Updated;
+
+        /// <summary>
+        /// Gets a name for this indicator
+        /// </summary>
+        string Name { get; }
+
+        /// <summary>
+        /// Gets a flag indicating when this indicator is ready and fully initialized
+        /// </summary>
+        bool IsReady { get; }
+
+        /// <summary>
+        /// Gets the current state of this indicator. If the state has not been updated
+        /// then the time on the value will equal DateTime.MinValue.
+        /// </summary>
+        IndicatorDataPoint Current { get; }
+
+        /// <summary>
+        /// Gets the number of samples processed by this indicator
+        /// </summary>
+        long Samples { get; }
+
+        /// <summary>
+        /// Updates the state of this indicator with the given value and returns true
+        /// if this indicator is ready, false otherwise
+        /// </summary>
+        /// <param name="input">The value to use to update this indicator</param>
+        /// <returns>True if this indicator is ready, false otherwise</returns>
+        bool Update(IBaseData input);
+
+        /// <summary>
+        /// Resets this indicator to its initial state
+        /// </summary>
+        void Reset();
+    }
+}