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 QuantConnect.Data.Market;
+
+namespace QuantConnect.Indicators
+{
+    /// <summary>
+    /// This indicator computes the Volume Weighted Moving Average (VWMA)
+    /// It is a technical analysis indicator used by traders to determine the average price of an asset over a given period of time,
+    /// taking into account both price and volume.
+    /// </summary>
+    public class VolumeWeightedMovingAverage : TradeBarIndicator, IIndicatorWarmUpPeriodProvider
+    {
+
+        private readonly IndicatorBase<IndicatorDataPoint> _rollingSumPriceMultipliedByVolume;
+        private readonly IndicatorBase<IndicatorDataPoint> _rollingSumVolume;
+
+        /// <summary>
+        /// Required period, in data points, for the indicator to be ready and fully initialized.
+        /// </summary>
+        public int WarmUpPeriod { get; }
+
+        /// <summary>
+        /// Gets a flag indicating when this indicator is ready and fully initialized
+        /// </summary>
+        public override bool IsReady => _rollingSumPriceMultipliedByVolume.IsReady && _rollingSumVolume.IsReady;
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VolumeWeightedMovingAverage"/> class using the specified name.
+        /// </summary>
+        /// <param name="name">The name of this indicator</param>
+        /// <param name="period">The period of the SMA</param>
+        public VolumeWeightedMovingAverage(string name, int period)
+            : base(name)
+        {
+            WarmUpPeriod = period;
+            _rollingSumPriceMultipliedByVolume = new Sum(name + "_SumPxV", period);
+            _rollingSumVolume = new Sum(name + "_SumVolume", period);
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="VolumeWeightedMovingAverage"/> class using the specified name.
+        /// </summary>
+        /// <param name="period">The period of the SMA</param>
+        public VolumeWeightedMovingAverage(int period)
+            : this($"VWMA({period})", period)
+        {
+        }
+
+        /// <summary>
+        /// Computes the next value of this indicator from the given state
+        /// </summary>
+        /// <param name="input">The input given to the indicator</param>
+        /// <returns>A new value for this indicator</returns>
+        protected override decimal ComputeNextValue(TradeBar input)
+        {
+            _rollingSumPriceMultipliedByVolume.Update(input.EndTime, input.Close * input.Volume);
+            _rollingSumVolume.Update(input.EndTime, input.Volume);
+            var sumVolume = _rollingSumVolume.Current.Value;
+            if (sumVolume != 0)
+            {
+                return _rollingSumPriceMultipliedByVolume.Current.Value / sumVolume;
+            }
+            return input.Close;
+        }
+
+        /// <summary>
+        /// Resets this indicator to its initial state
+        /// </summary>
+        public override void Reset()
+        {
+            _rollingSumPriceMultipliedByVolume.Reset();
+            _rollingSumVolume.Reset();
+            base.Reset();
+        }
+
+    }
+}