From 8fb8117b9fdfe1601e9ecaaa805e81f4447bd04d Mon Sep 17 00:00:00 2001
From: moshferatu <gitea@steveharris.sh>
Date: Tue, 19 Mar 2024 05:45:02 -0700
Subject: [PATCH] Simple reversal indicator

---
 indicators/SimpleReversal.cs | 155 +++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 indicators/SimpleReversal.cs

diff --git a/indicators/SimpleReversal.cs b/indicators/SimpleReversal.cs
new file mode 100644
index 0000000..471f7b9
--- /dev/null
+++ b/indicators/SimpleReversal.cs
@@ -0,0 +1,155 @@
+#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
+{
+    public class SimpleReversal : Indicator
+    {
+        protected override void OnStateChange()
+        {
+            if (State == State.SetDefaults)
+            {
+                Description = @"";
+                Name = "Simple Reversal";
+                Calculate = Calculate.OnBarClose;
+                IsOverlay = true;
+                DisplayInDataBox = true;
+                DrawOnPricePanel = true;
+                ScaleJustification = ScaleJustification.Right;
+                IsSuspendedWhileInactive = true;
+            }
+            else if (State == State.Configure)
+            {
+            }
+        }
+
+        protected override void OnBarUpdate()
+        {
+            if (CurrentBar < 2)
+                return;
+
+            if (LongReversal())
+                DrawTriangle(true);
+            else if (ShortReversal())
+                DrawTriangle(false);
+        }
+
+        private bool LongReversal()
+        {
+            return (Close[2] < Open[2]) &&
+                   (Low[1] < Low[2]) &&
+                   (Low[1] < Low[0]) &&
+                   (Close[0] > High[1]) &&
+                   (Close[0] > High[2]);
+        }
+
+        private bool ShortReversal()
+        {
+            return (Close[2] > Open[2]) &&
+                   (High[1] > High[2]) &&
+                   (High[1] > High[0]) &&
+                   (Close[0] < Low[1]) &&
+                   (Close[0] < Low[2]);
+        }
+
+        private void DrawTriangle(bool isLong)
+        {
+            var brush = isLong ? Brushes.LimeGreen : Brushes.Red;
+            var yValue = isLong ? Low[0] : High[0];
+
+            if (isLong)
+            {
+                var triangleUp = Draw.TriangleUp(this, "LongReversal@" + CurrentBar, true, 0, yValue, brush);
+                triangleUp.OutlineBrush = Brushes.Transparent;
+            }
+            else
+            {
+                var triangleDown = Draw.TriangleDown(this, "ShortReversal@" + CurrentBar, true, 0, yValue, brush);
+                triangleDown.OutlineBrush = Brushes.Transparent;
+            }
+        }
+
+        public override string DisplayName
+        {
+            get { return Name; }
+        }
+    }
+}
+
+#region NinjaScript generated code. Neither change nor remove.
+
+namespace NinjaTrader.NinjaScript.Indicators
+{
+    public partial class Indicator : NinjaTrader.Gui.NinjaScript.IndicatorRenderBase
+    {
+        private SimpleReversal[] cacheSimpleReversal;
+        public SimpleReversal SimpleReversal()
+        {
+            return SimpleReversal(Input);
+        }
+
+        public SimpleReversal SimpleReversal(ISeries<double> input)
+        {
+            if (cacheSimpleReversal != null)
+                for (int idx = 0; idx < cacheSimpleReversal.Length; idx++)
+                    if (cacheSimpleReversal[idx] != null &&  cacheSimpleReversal[idx].EqualsInput(input))
+                        return cacheSimpleReversal[idx];
+            return CacheIndicator<SimpleReversal>(new SimpleReversal(), input, ref cacheSimpleReversal);
+        }
+    }
+}
+
+namespace NinjaTrader.NinjaScript.MarketAnalyzerColumns
+{
+    public partial class MarketAnalyzerColumn : MarketAnalyzerColumnBase
+    {
+        public Indicators.SimpleReversal SimpleReversal()
+        {
+            return indicator.SimpleReversal(Input);
+        }
+
+        public Indicators.SimpleReversal SimpleReversal(ISeries<double> input )
+        {
+            return indicator.SimpleReversal(input);
+        }
+    }
+}
+
+namespace NinjaTrader.NinjaScript.Strategies
+{
+    public partial class Strategy : NinjaTrader.Gui.NinjaScript.StrategyRenderBase
+    {
+        public Indicators.SimpleReversal SimpleReversal()
+        {
+            return indicator.SimpleReversal(Input);
+        }
+
+        public Indicators.SimpleReversal SimpleReversal(ISeries<double> input )
+        {
+            return indicator.SimpleReversal(input);
+        }
+    }
+}
+
+#endregion