diff --git a/indicators/OrderFlowOscillator.cs b/indicators/OrderFlowOscillator.cs
new file mode 100644
index 0000000..6a16878
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+++ b/indicators/OrderFlowOscillator.cs
@@ -0,0 +1,208 @@
+#region Using declarations
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Xml.Serialization;
+using NinjaTrader.Cbi;
+using NinjaTrader.Gui;
+using NinjaTrader.Gui.Chart;
+using NinjaTrader.Gui.SuperDom;
+using NinjaTrader.Gui.Tools;
+using NinjaTrader.Data;
+using NinjaTrader.NinjaScript;
+using NinjaTrader.Core.FloatingPoint;
+using NinjaTrader.NinjaScript.DrawingTools;
+#endregion
+
+//This namespace holds Indicators in this folder and is required. Do not change it. 
+namespace NinjaTrader.NinjaScript.Indicators
+{
+    [CategoryOrder("Order Flow Oscillator", 1)]
+    [CategoryOrder("Plots", 2)]
+    public class OrderFlowOscillator : Indicator
+    {
+        private double TradesAtBid = 0;
+        private double TradesAtAsk = 0;
+
+        private Series<double> AverageGain;
+        private Series<double> AverageLoss;
+
+        protected override void OnStateChange()
+        {
+            if (State == State.SetDefaults)
+            {
+                Description = @"Credit to @jamestsliu for the idea, though the result is different.";
+                Name = "Order Flow Oscillator";
+                Calculate = Calculate.OnEachTick;
+                IsOverlay = false;
+                DisplayInDataBox = true;
+                DrawOnPricePanel = true;
+                DrawHorizontalGridLines = true;
+                DrawVerticalGridLines = true;
+                PaintPriceMarkers = true;
+                ScaleJustification = ScaleJustification.Right;
+                IsSuspendedWhileInactive = false;
+                Period = 14;
+                UpperLevel = 70.0;
+                LowerLevel = 30.0;
+                UpperLevelStroke = new Stroke(Brushes.Red, 3);
+                LowerLevelStroke = new Stroke(Brushes.LimeGreen, 3);
+                AddPlot(new Stroke(Brushes.Yellow, 2), PlotStyle.Line, "Order Flow Oscillator");
+            }
+            else if (State == State.Configure)
+            {
+                AddLine(UpperLevelStroke, UpperLevel, "Upper Level");
+                AddLine(LowerLevelStroke, LowerLevel, "Lower Level");
+            }
+            else if (State == State.DataLoaded)
+            {
+                AverageGain = new Series<double>(this);
+                AverageLoss = new Series<double>(this);
+            }
+        }
+
+        protected override void OnBarUpdate()
+        {
+            if (CurrentBar < 2)
+                return;
+
+            // Order Flow Imbalance
+            double OFI = TradesAtAsk - TradesAtBid;
+
+            if (CurrentBar < Period)
+            {
+                AverageGain[0] = (AverageGain[1] * (CurrentBar - 1) + (OFI > 0 ? OFI : 0)) / CurrentBar;
+                AverageLoss[0] = (AverageLoss[1] * (CurrentBar - 1) + (OFI < 0 ? -OFI : 0)) / CurrentBar;
+            }
+            else
+            {
+                AverageGain[0] = ((AverageGain[1] * (Period - 1)) + (OFI > 0 ? OFI : 0)) / Period;
+                AverageLoss[0] = ((AverageLoss[1] * (Period - 1)) + (OFI < 0 ? -OFI : 0)) / Period;
+            }
+
+            // Relative Strength
+            double RS = AverageLoss.Equals(0) ? 0 : AverageGain[0] / AverageLoss[0];
+            double OFI_RSI = 100 - (100 / (1 + RS));
+
+            Oscillator[0] = OFI_RSI;
+        }
+
+        protected override void OnMarketData(MarketDataEventArgs marketDataUpdate)
+        {
+            if (IsFirstTickOfBar)
+            {
+                TradesAtBid = 0;
+                TradesAtAsk = 0;
+            }
+
+            if (marketDataUpdate.MarketDataType == MarketDataType.Last)
+            {
+                if (marketDataUpdate.Price <= marketDataUpdate.Bid)
+                    TradesAtBid += 1;
+                else if (marketDataUpdate.Price >= marketDataUpdate.Ask)
+                    TradesAtAsk += 1;
+            }
+        }
+
+        public override string DisplayName
+        {
+            get { return Name; }
+        }
+
+        #region Properties
+        [Browsable(false)]
+        [XmlIgnore]
+        public Series<double> Oscillator
+        {
+            get { return Values[0]; }
+        }
+
+        [NinjaScriptProperty]
+        [Range(1, int.MaxValue)]
+        [Display(Name = "Period", Order = 1, GroupName = "Order Flow Oscillator")]
+        public int Period { get; set; }
+
+        [NinjaScriptProperty]
+        [Range(double.MinValue, double.MaxValue)]
+        [Display(Name = "Upper Level", Order = 2, GroupName = "Plots")]
+        public double UpperLevel { get; set; }
+
+        [NinjaScriptProperty]
+        [Display(Name = "Upper Level Style", Order = 3, GroupName = "Plots")]
+        public Stroke UpperLevelStroke { get; set; }
+
+        [NinjaScriptProperty]
+        [Range(double.MinValue, double.MaxValue)]
+        [Display(Name = "Lower Level", Order = 4, GroupName = "Plots")]
+        public double LowerLevel { get; set; }
+
+        [NinjaScriptProperty]
+        [Display(Name = "Lower Level Style", Order = 5, GroupName = "Plots")]
+        public Stroke LowerLevelStroke { get; set; }
+        #endregion
+    }
+}
+
+#region NinjaScript generated code. Neither change nor remove.
+
+namespace NinjaTrader.NinjaScript.Indicators
+{
+    public partial class Indicator : NinjaTrader.Gui.NinjaScript.IndicatorRenderBase
+    {
+        private OrderFlowOscillator[] cacheOrderFlowOscillator;
+        public OrderFlowOscillator OrderFlowOscillator(int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            return OrderFlowOscillator(Input, period, upperLevel, upperLevelStroke, lowerLevel, lowerLevelStroke);
+        }
+
+        public OrderFlowOscillator OrderFlowOscillator(ISeries<double> input, int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            if (cacheOrderFlowOscillator != null)
+                for (int idx = 0; idx < cacheOrderFlowOscillator.Length; idx++)
+                    if (cacheOrderFlowOscillator[idx] != null && cacheOrderFlowOscillator[idx].Period == period && cacheOrderFlowOscillator[idx].UpperLevel == upperLevel && cacheOrderFlowOscillator[idx].UpperLevelStroke == upperLevelStroke && cacheOrderFlowOscillator[idx].LowerLevel == lowerLevel && cacheOrderFlowOscillator[idx].LowerLevelStroke == lowerLevelStroke && cacheOrderFlowOscillator[idx].EqualsInput(input))
+                        return cacheOrderFlowOscillator[idx];
+            return CacheIndicator<OrderFlowOscillator>(new OrderFlowOscillator(){ Period = period, UpperLevel = upperLevel, UpperLevelStroke = upperLevelStroke, LowerLevel = lowerLevel, LowerLevelStroke = lowerLevelStroke }, input, ref cacheOrderFlowOscillator);
+        }
+    }
+}
+
+namespace NinjaTrader.NinjaScript.MarketAnalyzerColumns
+{
+    public partial class MarketAnalyzerColumn : MarketAnalyzerColumnBase
+    {
+        public Indicators.OrderFlowOscillator OrderFlowOscillator(int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            return indicator.OrderFlowOscillator(Input, period, upperLevel, upperLevelStroke, lowerLevel, lowerLevelStroke);
+        }
+
+        public Indicators.OrderFlowOscillator OrderFlowOscillator(ISeries<double> input , int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            return indicator.OrderFlowOscillator(input, period, upperLevel, upperLevelStroke, lowerLevel, lowerLevelStroke);
+        }
+    }
+}
+
+namespace NinjaTrader.NinjaScript.Strategies
+{
+    public partial class Strategy : NinjaTrader.Gui.NinjaScript.StrategyRenderBase
+    {
+        public Indicators.OrderFlowOscillator OrderFlowOscillator(int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            return indicator.OrderFlowOscillator(Input, period, upperLevel, upperLevelStroke, lowerLevel, lowerLevelStroke);
+        }
+
+        public Indicators.OrderFlowOscillator OrderFlowOscillator(ISeries<double> input , int period, double upperLevel, Stroke upperLevelStroke, double lowerLevel, Stroke lowerLevelStroke)
+        {
+            return indicator.OrderFlowOscillator(input, period, upperLevel, upperLevelStroke, lowerLevel, lowerLevelStroke);
+        }
+    }
+}
+
+#endregion