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https://github.com/mihakralj/QuanTAlib.git
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Add TTM Scalper indicator implementation in C# and Pine Script; update Blma class for average calculation; remove missing indicators report and oscillator docs rewrite plans.
This commit is contained in:
Miha Kralj
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// PIVOTFIB: Fibonacci Pivot Points
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// Calculates 7 support/resistance levels using Fibonacci ratios applied to previous bar's HLC range.
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// Fibonacci retracement levels (38.2%, 61.8%, 100%) centered on the pivot point.
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace QuanTAlib;
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/// <summary>
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/// PIVOTFIB: Fibonacci Pivot Points
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/// </summary>
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/// <remarks>
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/// Computes 7 horizontal support/resistance levels from the previous bar's
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/// high, low, and close using Fibonacci ratios. The central pivot point (PP)
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/// is the arithmetic mean of HLC; resistance and support levels are derived
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/// by adding/subtracting Fibonacci proportions of the prior bar's range.
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///
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/// Calculation (using previous bar's H, L, C):
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/// <code>
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/// PP = (H + L + C) / 3
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/// range = H - L
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/// R1 = PP + 0.382 * range S1 = PP - 0.382 * range
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/// R2 = PP + 0.618 * range S2 = PP - 0.618 * range
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/// R3 = PP + 1.000 * range S3 = PP - 1.000 * range
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/// </code>
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///
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/// <b>Key characteristics:</b>
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/// - O(1) computation: pure arithmetic from previous bar's HLC
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/// - 7 outputs: PP, R1, R2, R3, S1, S2, S3
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/// - WarmupPeriod = 2 (need previous bar's HLC)
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/// - No configurable parameters
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/// - Levels remain constant until a new bar arrives
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/// </remarks>
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/// <seealso href="Pivotfib.md">Detailed documentation</seealso>
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[SkipLocalsInit]
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public sealed class Pivotfib : ITValuePublisher
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{
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[StructLayout(LayoutKind.Auto)]
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private record struct State(
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double PrevHigh,
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double PrevLow,
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double PrevClose,
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double LastValidHigh,
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double LastValidLow,
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double LastValidClose);
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private State _s;
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private State _ps;
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private int _count;
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private readonly TBarPublishedHandler _barHandler;
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/// <summary>Display name for the indicator.</summary>
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public string Name { get; }
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/// <summary>Bars required for the indicator to warm up.</summary>
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public int WarmupPeriod { get; }
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/// <summary>Central Pivot Point: (prevH + prevL + prevC) / 3</summary>
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public double PP { get; private set; }
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/// <summary>Resistance 1: PP + 0.382 * range</summary>
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public double R1 { get; private set; }
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/// <summary>Resistance 2: PP + 0.618 * range</summary>
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public double R2 { get; private set; }
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/// <summary>Resistance 3: PP + 1.000 * range</summary>
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public double R3 { get; private set; }
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/// <summary>Support 1: PP - 0.382 * range</summary>
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public double S1 { get; private set; }
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/// <summary>Support 2: PP - 0.618 * range</summary>
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public double S2 { get; private set; }
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/// <summary>Support 3: PP - 1.000 * range</summary>
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public double S3 { get; private set; }
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/// <summary>Primary output value (PP as TValue).</summary>
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public TValue Last { get; private set; }
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/// <summary>True when enough bars have been processed for valid output.</summary>
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public bool IsHot => _count >= 2;
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public event TValuePublishedHandler? Pub;
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/// <summary>
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/// Creates a Fibonacci Pivot Points indicator.
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/// </summary>
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public Pivotfib()
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{
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_count = 0;
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_s = new State(double.NaN, double.NaN, double.NaN, double.NaN, double.NaN, double.NaN);
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_ps = _s;
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PP = double.NaN;
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R1 = double.NaN;
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R2 = double.NaN;
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R3 = double.NaN;
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S1 = double.NaN;
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S2 = double.NaN;
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S3 = double.NaN;
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Name = "Pivotfib";
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WarmupPeriod = 2;
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_barHandler = HandleBar;
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}
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/// <summary>
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/// Creates a Fibonacci Pivot Points indicator chained to a TBarSeries source.
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/// </summary>
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public Pivotfib(TBarSeries source)
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: this()
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{
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Prime(source);
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source.Pub += _barHandler;
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}
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private void HandleBar(object? sender, in TBarEventArgs e) => Update(e.Value, e.IsNew);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private void PubEvent(TValue value, bool isNew = true) =>
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Pub?.Invoke(this, new TValueEventArgs { Value = value, IsNew = isNew });
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public TValue Update(TBar input, bool isNew = true)
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{
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if (isNew)
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{
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_ps = _s;
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_count++;
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}
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else
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{
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_s = _ps;
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}
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var s = _s;
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// Validate inputs - substitute last-valid on NaN/Infinity
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double high = input.High;
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double low = input.Low;
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double close = input.Close;
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if (double.IsFinite(high)) { s.LastValidHigh = high; }
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else { high = s.LastValidHigh; }
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if (double.IsFinite(low)) { s.LastValidLow = low; }
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else { low = s.LastValidLow; }
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if (double.IsFinite(close)) { s.LastValidClose = close; }
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else { close = s.LastValidClose; }
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// If still no valid data, return NaN
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if (double.IsNaN(high) || double.IsNaN(low) || double.IsNaN(close))
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{
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_s = s;
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SetAllNaN();
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Last = new TValue(input.Time, double.NaN);
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PubEvent(Last, isNew);
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return Last;
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}
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// First bar: store HLC but cannot compute pivots yet (no previous bar)
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if (_count < 2)
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{
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s.PrevHigh = high;
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s.PrevLow = low;
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s.PrevClose = close;
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_s = s;
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SetAllNaN();
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Last = new TValue(input.Time, double.NaN);
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PubEvent(Last, isNew);
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return Last;
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}
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// Compute pivot levels from PREVIOUS bar's HLC
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double pH = s.PrevHigh;
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double pL = s.PrevLow;
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double pC = s.PrevClose;
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double pp = (pH + pL + pC) / 3.0;
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double range = pH - pL;
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PP = pp;
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R1 = Math.FusedMultiplyAdd(0.382, range, pp); // pp + 0.382 * range
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S1 = Math.FusedMultiplyAdd(-0.382, range, pp); // pp - 0.382 * range
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R2 = Math.FusedMultiplyAdd(0.618, range, pp); // pp + 0.618 * range
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S2 = Math.FusedMultiplyAdd(-0.618, range, pp); // pp - 0.618 * range
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R3 = pp + range; // pp + 1.000 * range
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S3 = pp - range; // pp - 1.000 * range
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// Store current bar's HLC as "previous" for next bar
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s.PrevHigh = high;
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s.PrevLow = low;
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s.PrevClose = close;
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_s = s;
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Last = new TValue(input.Time, PP);
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PubEvent(Last, isNew);
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return Last;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public TValue Update(TValue input, bool isNew = true) =>
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Update(new TBar(input.Time, input.Value, input.Value, input.Value, input.Value, 0), isNew);
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public TSeries Update(TBarSeries source)
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{
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if (source.Count == 0)
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{
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return new TSeries([], []);
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}
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int len = source.Count;
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var t = new List<long>(len);
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var v = new List<double>(len);
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CollectionsMarshal.SetCount(t, len);
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CollectionsMarshal.SetCount(v, len);
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Batch(source.HighValues, source.LowValues, source.CloseValues,
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CollectionsMarshal.AsSpan(v));
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source.Times.CopyTo(CollectionsMarshal.AsSpan(t));
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// Prime internal state for continued streaming
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Prime(source);
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var lastTime = new DateTime(source.Times[^1], DateTimeKind.Utc);
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Last = new TValue(lastTime, CollectionsMarshal.AsSpan(v)[^1]);
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return new TSeries(t, v);
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}
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public void Prime(TBarSeries source)
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{
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Reset();
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if (source.Count == 0)
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{
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return;
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}
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for (int i = 0; i < source.Count; i++)
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{
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Update(source[i], isNew: true);
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}
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}
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public void Prime(ReadOnlySpan<double> source, TimeSpan? step = null)
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{
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Reset();
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if (source.Length == 0)
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{
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return;
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}
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long t = DateTime.UtcNow.Ticks;
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long stepTicks = (step ?? TimeSpan.FromMinutes(1)).Ticks;
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for (int i = 0; i < source.Length; i++)
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{
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double val = source[i];
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Update(new TBar(t, val, val, val, val, 0), isNew: true);
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t += stepTicks;
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}
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}
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public void Reset()
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{
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_count = 0;
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_s = new State(double.NaN, double.NaN, double.NaN, double.NaN, double.NaN, double.NaN);
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_ps = _s;
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SetAllNaN();
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Last = default;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private void SetAllNaN()
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{
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PP = double.NaN;
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R1 = double.NaN;
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R2 = double.NaN;
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R3 = double.NaN;
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S1 = double.NaN;
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S2 = double.NaN;
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S3 = double.NaN;
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}
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/// <summary>
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/// Batch computation of Fibonacci Pivot Points over span data.
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/// Writes PP values to <paramref name="ppOutput"/>.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void Batch(
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ReadOnlySpan<double> high,
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ReadOnlySpan<double> low,
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ReadOnlySpan<double> close,
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Span<double> ppOutput)
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{
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if (high.Length != low.Length || high.Length != close.Length)
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{
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throw new ArgumentException("Input spans must have the same length.", nameof(high));
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}
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if (ppOutput.Length < high.Length)
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{
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throw new ArgumentException("Output span must be at least as long as input.", nameof(ppOutput));
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}
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int len = high.Length;
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if (len == 0)
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{
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return;
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}
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// First bar: no previous data
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ppOutput[0] = double.NaN;
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// Remaining bars: compute from previous bar's HLC
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for (int i = 1; i < len; i++)
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{
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double pH = high[i - 1];
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double pL = low[i - 1];
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double pC = close[i - 1];
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ppOutput[i] = (pH + pL + pC) / 3.0;
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}
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}
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public static TSeries Batch(TBarSeries source)
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{
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if (source == null || source.Count == 0)
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{
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return new TSeries([], []);
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}
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int len = source.Count;
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var t = new List<long>(len);
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var v = new List<double>(len);
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CollectionsMarshal.SetCount(t, len);
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CollectionsMarshal.SetCount(v, len);
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Batch(source.HighValues, source.LowValues, source.CloseValues,
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CollectionsMarshal.AsSpan(v));
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source.Times.CopyTo(CollectionsMarshal.AsSpan(t));
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return new TSeries(t, v);
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}
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/// <summary>
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/// Batch computation of all 7 Fibonacci Pivot Point levels over span data.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void BatchAll(
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ReadOnlySpan<double> high,
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ReadOnlySpan<double> low,
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ReadOnlySpan<double> close,
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Span<double> ppOut,
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Span<double> r1Out,
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Span<double> s1Out,
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Span<double> r2Out,
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Span<double> s2Out,
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Span<double> r3Out,
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Span<double> s3Out)
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{
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if (high.Length != low.Length || high.Length != close.Length)
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{
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throw new ArgumentException("Input spans must have the same length.", nameof(high));
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}
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int len = high.Length;
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if (ppOut.Length < len) { throw new ArgumentException("Output span too short.", nameof(ppOut)); }
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if (r1Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(r1Out)); }
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if (s1Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(s1Out)); }
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if (r2Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(r2Out)); }
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if (s2Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(s2Out)); }
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if (r3Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(r3Out)); }
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if (s3Out.Length < len) { throw new ArgumentException("Output span too short.", nameof(s3Out)); }
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if (len == 0)
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{
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return;
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}
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// First bar: no previous data
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ppOut[0] = double.NaN;
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r1Out[0] = double.NaN;
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s1Out[0] = double.NaN;
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r2Out[0] = double.NaN;
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s2Out[0] = double.NaN;
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r3Out[0] = double.NaN;
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s3Out[0] = double.NaN;
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for (int i = 1; i < len; i++)
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{
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double pH = high[i - 1];
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double pL = low[i - 1];
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double pC = close[i - 1];
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double pp = (pH + pL + pC) / 3.0;
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double range = pH - pL;
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ppOut[i] = pp;
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r1Out[i] = Math.FusedMultiplyAdd(0.382, range, pp);
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s1Out[i] = Math.FusedMultiplyAdd(-0.382, range, pp);
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r2Out[i] = Math.FusedMultiplyAdd(0.618, range, pp);
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s2Out[i] = Math.FusedMultiplyAdd(-0.618, range, pp);
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r3Out[i] = pp + range;
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s3Out[i] = pp - range;
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}
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}
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public static (TSeries Results, Pivotfib Indicator) Calculate(TBarSeries source)
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{
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var indicator = new Pivotfib();
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var results = indicator.Update(source);
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return (results, indicator);
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}
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}
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