gavindiaz/QuanTAlib
1
0
Fork 0
mirror of https://github.com/mihakralj/QuanTAlib.git synced 2026-08-12 23:58:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge dev into main: v0.8.7 Kahan compensated summation

Browse Source
This commit is contained in:
Miha Kralj
2026-03-13 22:01:52 -07:00
parent 86a1db286c 67ad6f0cba
commit 9697facfb4
79 changed files with 2923 additions and 2495 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/oscillators/bbs/Bbs.cs
+49 -32
View File
@@ -53,6 +53,9 @@ public sealed class Bbs : ITValuePublisher
double BbSum,
double BbSumSq,
double KcSum,
double BbSumComp,
double BbSumSqComp,
double KcSumComp,
double AtrRaw,
double AtrE,
double PrevClose,
@@ -65,10 +68,6 @@ public sealed class Bbs : ITValuePublisher
private State _state;
private State _p_state;
private const int ResyncInterval = 1000;
private int _tickCount;
private int _p_tickCount;
// Saved squeeze state for SqueezeFired detection
private bool _prevSqueezeOn;
private bool _p_prevSqueezeOn;
@@ -169,7 +168,7 @@ public sealed class Bbs : ITValuePublisher
_bbBuffer = new RingBuffer(bbPeriod);
_kcBuffer = new RingBuffer(kcPeriod);
_state = new State(0, 0, 0, 0, 1.0, double.NaN, double.NaN, double.NaN, double.NaN, 0, false);
_state = new State(0, 0, 0, 0, 0, 0, 0, 1.0, double.NaN, double.NaN, double.NaN, double.NaN, 0, false);
_p_state = _state;
}
@@ -234,13 +233,11 @@ public sealed class Bbs : ITValuePublisher
if (isNew)
{
_p_state = _state;
_p_tickCount = _tickCount;
_p_prevSqueezeOn = _prevSqueezeOn;
}
else
{
_state = _p_state;
_tickCount = _p_tickCount;
_prevSqueezeOn = _p_prevSqueezeOn;
}
@@ -251,23 +248,46 @@ public sealed class Bbs : ITValuePublisher
_state = _state with { Bars = _state.Bars + 1 };
}
// === Bollinger Bands: SMA + population stddev via rolling sum/sumSq ===
// === Bollinger Bands: Kahan compensated SMA + population stddev ===
if (_bbBuffer.IsFull)
{
double oldest = _bbBuffer.Oldest;
double bbDelta = close - oldest;
double bbSqDelta = (close * close) - (oldest * oldest);
{
double y = bbDelta - _state.BbSumComp;
double t = _state.BbSum + y;
double newComp = (t - _state.BbSum) - y;
double y2 = bbSqDelta - _state.BbSumSqComp;
double t2 = _state.BbSumSq + y2;
double newSqComp = (t2 - _state.BbSumSq) - y2;
_state = _state with
{
BbSum = t,
BbSumComp = newComp,
BbSumSq = t2,
BbSumSqComp = newSqComp
};
}
}
else
{
double y = close - _state.BbSumComp;
double t = _state.BbSum + y;
double newComp = (t - _state.BbSum) - y;
double y2 = (close * close) - _state.BbSumSqComp;
double t2 = _state.BbSumSq + y2;
double newSqComp = (t2 - _state.BbSumSq) - y2;
_state = _state with
{
BbSum = _state.BbSum - oldest,
BbSumSq = _state.BbSumSq - (oldest * oldest)
BbSum = t,
BbSumComp = newComp,
BbSumSq = t2,
BbSumSqComp = newSqComp
};
}
_bbBuffer.Add(close, isNew);
_state = _state with
{
BbSum = _state.BbSum + close,
BbSumSq = _state.BbSumSq + (close * close)
};
int bbCount = _bbBuffer.Count;
double bbMean = bbCount > 0 ? _state.BbSum / bbCount : close;
@@ -277,15 +297,24 @@ public sealed class Bbs : ITValuePublisher
double bbUpper = bbMean + (_bbMult * bbStdDev);
double bbLower = bbMean - (_bbMult * bbStdDev);
// === Keltner Channel: SMA middle + EMA-smoothed ATR ===
// === Keltner Channel: Kahan compensated SMA middle + EMA-smoothed ATR ===
if (_kcBuffer.IsFull)
{
double oldest = _kcBuffer.Oldest;
_state = _state with { KcSum = _state.KcSum - oldest };
double kcDelta = close - oldest;
double y = kcDelta - _state.KcSumComp;
double t = _state.KcSum + y;
_state = _state with { KcSum = t, KcSumComp = (t - _state.KcSum) - y };
// Fix: need to use pre-update KcSum for comp calc
}
else
{
double y = close - _state.KcSumComp;
double t = _state.KcSum + y;
_state = _state with { KcSum = t, KcSumComp = (t - _state.KcSum) - y };
}
_kcBuffer.Add(close, isNew);
_state = _state with { KcSum = _state.KcSum + close };
int kcCount = _kcBuffer.Count;
double kcMid = kcCount > 0 ? _state.KcSum / kcCount : close;
@@ -331,16 +360,6 @@ public sealed class Bbs : ITValuePublisher
// === Bandwidth ===
double bandwidth = bbMean != 0.0 ? ((bbUpper - bbLower) / bbMean) * 100.0 : 0.0; // skipcq: CS-R1077 - Exact-zero div guard: price avg
// === Resync for floating-point drift ===
if (isNew)
{
_tickCount++;
if (_bbBuffer.IsFull && _tickCount >= ResyncInterval)
{
_tickCount = 0;
RecalculateSums();
}
}
// === IsHot ===
if (!_state.IsHot && _state.Bars >= WarmupPeriod)
@@ -644,7 +663,7 @@ public sealed class Bbs : ITValuePublisher
kcSum += _kcBuffer[i];
}
_state = _state with { BbSum = bbSum, BbSumSq = bbSumSq, KcSum = kcSum };
_state = _state with { BbSum = bbSum, BbSumSq = bbSumSq, KcSum = kcSum, BbSumComp = 0, BbSumSqComp = 0, KcSumComp = 0 };
}
/// <summary>
@@ -656,10 +675,8 @@ public sealed class Bbs : ITValuePublisher
_bbBuffer.Clear();
_kcBuffer.Clear();
_state = new State(0, 0, 0, 0, 1.0, double.NaN, double.NaN, double.NaN, double.NaN, 0, false);
_state = new State(0, 0, 0, 0, 0, 0, 0, 1.0, double.NaN, double.NaN, double.NaN, double.NaN, 0, false);
_p_state = _state;
_tickCount = 0;
_p_tickCount = 0;
_prevSqueezeOn = false;
_p_prevSqueezeOn = false;