TR and ATR

Source/Basics/MAX_Series.cs

@@ -0,0 +1,31 @@
+namespace QuanTAlib;
+using System;
+
+/* <summary>
+MAX - Maximum value in the given period in the series.
+    If period = 0 => period = full length of the series
+</summary> */
+
+public class MAX_Series : Single_TSeries_Indicator
+{
+    public MAX_Series(TSeries source, int period, bool useNaN = false) : base(source, period, useNaN)
+    {
+        if (base._data.Count > 0) { base.Add(base._data); }
+    }
+    private readonly System.Collections.Generic.List<double> _buffer = new();
+
+    public override void Add((DateTime t, double v) d, bool update)
+    {
+        if (update) { this._buffer[this._buffer.Count - 1] = d.v; }
+        else { this._buffer.Add(d.v); }
+        if (this._buffer.Count > this._p && this._p != 0) { this._buffer.RemoveAt(0); }
+
+        double _max = d.v;
+        for (int i = 0; i < this._buffer.Count; i++)
+        { _max = (this._buffer[i] > _max) ? this._buffer[i] : _max; }
+
+        var result = (d.t, this.Count < this._p - 1 && this._NaN ? double.NaN : _max);
+
+        base.Add(result, update);
+    }
+}