kingchenc
f10b8c2e2d
* feat(family-09): add 7 trailing stops (HiLo, Volty, Yo-Yo, Donchian, Pct, Step, Renko)
Rounds out the Trailing Stops family from 5 to 12 indicators:
- HiLoActivator (Crabel): SMA-of-high/SMA-of-low trail with a one-bar
lag; emits the opposite-side SMA as the trailing stop.
- VoltyStop (Cynthia Kase): ATR trail anchored on the extreme close
since the trade was opened — tighter than AtrTrailingStop on
pullbacks.
- YoyoExit: long-only ATR trail with an explicit re-entry trigger at
trail + multiplier*ATR; exposes an in_trade flag.
- DonchianStop (Turtle): lowest low / highest high over the window;
multi-output {stop_long, stop_short}.
- PercentageTrailingStop: fixed-percent trail that scales across
instruments without per-asset tuning.
- StepTrailingStop: snaps to a step_size-aligned grid; mirrors
discretionary stop-by-hand workflow.
- RenkoTrailingStop: block-anchored trail; only moves on full-block
advances, ignores intra-block noise.
All seven are wired into wickra-core, the Python / Node / WASM
bindings, the indicator_update + indicator_update_candle fuzz targets,
the wickra bench harness, and the Python + Node test suites. README
counter bumps from 71 to 78; CHANGELOG entry under [Unreleased].
* fix(family-09): satisfy pedantic clippy lints
- hilo_activator: rewrite match-Some/None as if-let-else (single_match_else),
add backticks around the HiLo identifier in module/struct doc (doc_markdown).
- percentage / step / renko trailing stop tests: use f64::from(i32) instead
of `as f64` (cast_lossless).
- bench `benches()` is now >100 lines after Family 09 was wired in; allow
too_many_lines (matches the python pymodule fn).
462 lines
17 KiB
Python
462 lines
17 KiB
Python
"""Reference-value tests that pin numerical behaviour from the Python side."""
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from __future__ import annotations
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import math
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import numpy as np
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import pytest
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import wickra as ta
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def test_sma_constant_series():
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out = ta.SMA(5).batch(np.full(20, 42.0, dtype=np.float64))
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# First 4 are warmup -> NaN; rest equal 42.
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assert np.all(np.isnan(out[:4]))
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assert np.allclose(out[4:], 42.0)
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def test_sma_known_window():
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# SMA(3) of [2, 4, 6, 8, 10] -> [_, _, 4, 6, 8]
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out = ta.SMA(3).batch(np.array([2.0, 4.0, 6.0, 8.0, 10.0]))
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assert math.isnan(out[0]) and math.isnan(out[1])
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np.testing.assert_allclose(out[2:], [4.0, 6.0, 8.0])
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def test_ema_seed_equals_simple_mean_of_first_window():
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# EMA(5) seed = mean([10, 20, 30, 40, 50]) = 30
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out = ta.EMA(5).batch(np.array([10.0, 20.0, 30.0, 40.0, 50.0]))
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assert math.isnan(out[0])
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assert math.isclose(out[4], 30.0, abs_tol=1e-12)
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def test_wma_known_window():
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# WMA(4) of [1, 2, 3, 4] = (1*1 + 2*2 + 3*3 + 4*4)/10 = 3
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out = ta.WMA(4).batch(np.array([1.0, 2.0, 3.0, 4.0]))
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assert math.isnan(out[0]) and math.isnan(out[1]) and math.isnan(out[2])
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assert math.isclose(out[3], 3.0, abs_tol=1e-12)
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def test_rsi_pure_uptrend_is_100():
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out = ta.RSI(14).batch(np.arange(1.0, 21.0, dtype=np.float64))
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np.testing.assert_allclose(out[14:], 100.0)
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def test_rsi_pure_downtrend_is_0():
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out = ta.RSI(14).batch(np.arange(20.0, 0.0, -1.0))
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np.testing.assert_allclose(out[14:], 0.0)
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def test_rsi_flat_series_is_50():
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out = ta.RSI(14).batch(np.full(30, 100.0))
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np.testing.assert_allclose(out[14:], 50.0)
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def test_rsi_wilder_textbook_first_value():
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"""Wilder's original 14-period example, ~70.46 at the first emit."""
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prices = np.array(
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[
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44.34, 44.09, 44.15, 43.61, 44.33, 44.83, 45.10, 45.42, 45.84, 46.08,
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45.89, 46.03, 45.61, 46.28, 46.28,
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],
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dtype=np.float64,
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)
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out = ta.RSI(14).batch(prices)
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assert math.isclose(out[14], 70.464, abs_tol=0.05)
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def test_inertia_constant_rvi_passes_through_linreg():
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# Every bar identical (open, high, low, close) = (10, 11, 9, 10.5):
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# RVI = (c-o) / (h-l) = 0.5 / 2 = 0.25 every bar. LinReg of a constant
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# series equals that constant after warmup.
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n = 60
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out = ta.Inertia(3, 4).batch(
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np.full(n, 10.0), np.full(n, 11.0), np.full(n, 9.0), np.full(n, 10.5)
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)
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# warmup_period = 3 + 4 - 1 = 6.
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np.testing.assert_allclose(out[5:], 0.25, atol=1e-12)
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def test_connors_rsi_output_is_bounded():
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# CRSI is the average of three [0, 100] components, so the aggregate must
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# also sit in [0, 100] after warmup.
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prices = 100.0 + 20.0 * np.sin(np.linspace(0, 30, 250))
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out = ta.ConnorsRSI(3, 2, 100).batch(prices.astype(np.float64))
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ready = out[~np.isnan(out)]
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assert ready.size > 0
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assert ready.min() >= 0.0
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assert ready.max() <= 100.0
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def test_laguerre_rsi_constant_series_stays_at_mid_band():
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# All four Laguerre stages seed to the first input, so subsequent flat
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# inputs keep them equal and the up/down accumulator is 0 — Wickra maps
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# that to the neutral 50.
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out = ta.LaguerreRSI(0.5).batch(np.full(40, 42.0, dtype=np.float64))
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np.testing.assert_allclose(out, 50.0, atol=1e-12)
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def test_smi_close_at_centre_yields_zero():
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# Close at the midpoint of a flat high/low range -> displacement is
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# always zero -> SMI converges to 0.
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n = 60
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out = ta.SMI(5, 3, 3).batch(np.full(n, 11.0), np.full(n, 9.0), np.full(n, 10.0))
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# warmup_period = 5 + 3 + 3 - 2 = 9.
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np.testing.assert_allclose(out[8:], 0.0, atol=1e-12)
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def test_kst_constant_series_yields_zero():
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# ROC is zero on a flat input, so every RCMA is zero, so KST and its
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# signal SMA are both zero after warmup.
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kst = ta.KST(10, 15, 20, 30, 10, 10, 10, 15, 9)
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out = kst.batch(np.full(80, 42.0, dtype=np.float64))
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warmup = kst.warmup_period()
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# Use NaN-safe comparison on the post-warmup tail.
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tail = out[warmup - 1 :]
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assert np.all(np.isfinite(tail))
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np.testing.assert_allclose(tail, 0.0, atol=1e-12)
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def test_pgo_flat_close_yields_zero():
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# On a constant close the numerator (close − SMA) is zero, so PGO emits 0
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# regardless of the TR-EMA in the denominator.
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n = 20
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high = np.full(n, 11.0)
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low = np.full(n, 9.0)
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close = np.full(n, 10.0)
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out = ta.PGO(5).batch(high, low, close)
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assert np.all(np.isnan(out[:4]))
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np.testing.assert_allclose(out[4:], 0.0, atol=1e-12)
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def test_rvi_reference_value_period_2():
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# Two bars: (open, high, low, close) = (10, 11, 9, 10.5), (10.5, 11.5, 10, 11).
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# num = (0.5 + 0.5) = 1.0; den = (2.0 + 1.5) = 3.5; RVI = 1 / 3.5.
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out = ta.RVI(2).batch(
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np.array([10.0, 10.5]),
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np.array([11.0, 11.5]),
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np.array([9.0, 10.0]),
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np.array([10.5, 11.0]),
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)
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assert math.isnan(out[0])
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assert math.isclose(out[1], 1.0 / 3.5, abs_tol=1e-12)
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def test_alma_constant_series_yields_the_constant():
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# ALMA's Gaussian weights are normalised, so any constant series is
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# reproduced exactly after warmup.
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out = ta.ALMA(9, 0.85, 6.0).batch(np.full(30, 42.0, dtype=np.float64))
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assert np.all(np.isnan(out[:8]))
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np.testing.assert_allclose(out[8:], 42.0, atol=1e-12)
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def test_alma_reference_value_period_3():
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# ALMA(period=3, offset=0.85, sigma=6) on [10, 20, 30].
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# m = 0.85 * 2 = 1.7; s = 3 / 6 = 0.5; 2*s^2 = 0.5.
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out = ta.ALMA(3, 0.85, 6.0).batch(np.array([10.0, 20.0, 30.0]))
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assert math.isnan(out[0]) and math.isnan(out[1])
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# Independently compute the expected Gaussian-weighted sum.
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w = np.exp(-((np.arange(3, dtype=np.float64) - 1.7) ** 2) / 0.5)
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expected = float(np.dot([10.0, 20.0, 30.0], w) / w.sum())
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assert math.isclose(out[2], expected, abs_tol=1e-12)
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# Sanity: heavy offset toward the newest sample lifts the average above
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# the simple mean of 20.
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assert out[2] > 20.0
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def test_mcginley_dynamic_constant_series_yields_the_constant():
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# ratio = 1, so the recurrence collapses to MD + 0 / divisor = MD.
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out = ta.McGinleyDynamic(5).batch(np.full(30, 42.0, dtype=np.float64))
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assert np.all(np.isnan(out[:4]))
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np.testing.assert_allclose(out[4:], 42.0, atol=1e-12)
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def test_mcginley_dynamic_reference_value():
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# Period 3, seed = SMA([10, 20, 30]) = 20.0. Next price 40.0:
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# ratio = 2; divisor = 0.6 * 3 * 16 = 28.8; next = 20 + 20/28.8.
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out = ta.McGinleyDynamic(3).batch(np.array([10.0, 20.0, 30.0, 40.0]))
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assert math.isnan(out[0]) and math.isnan(out[1])
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assert math.isclose(out[2], 20.0, abs_tol=1e-12)
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expected = 20.0 + 20.0 / (0.6 * 3.0 * 16.0)
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assert math.isclose(out[3], expected, abs_tol=1e-12)
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def test_frama_constant_series_yields_the_constant():
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# Flat input -> degenerate ranges -> alpha clamps to 0.01 and the EMA
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# recurrence holds the seed value.
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out = ta.FRAMA(4).batch(np.full(20, 42.0, dtype=np.float64))
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assert np.all(np.isnan(out[:3]))
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np.testing.assert_allclose(out[3:], 42.0, atol=1e-12)
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def test_frama_pure_uptrend_hugs_latest():
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# Monotonic uptrend -> alpha pushed toward 1.0, FRAMA tracks close.
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out = ta.FRAMA(4).batch(np.arange(1.0, 9.0, dtype=np.float64))
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assert math.isclose(out[-1], 8.0, abs_tol=0.05)
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def test_jma_constant_series_yields_the_constant():
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# JMA seeds e0 and the output to the first input, so a constant series
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# is reproduced exactly from the first sample.
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out = ta.JMA(14, 0.0, 2).batch(np.full(30, 42.0, dtype=np.float64))
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np.testing.assert_allclose(out, 42.0, atol=1e-12)
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def test_evwma_reference_value_period_2():
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# EVWMA(2). Bars: (close, volume) = (10, 1), (20, 3), (30, 1).
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# Bar 2: sum_v = 4, seeded prev = 20, EVWMA = (1*20 + 3*20)/4 = 20.
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# Bar 3: sum_v = 4 (drops 1, gains 1), EVWMA = (3*20 + 1*30)/4 = 22.5.
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out = ta.EVWMA(2).batch(np.array([10.0, 20.0, 30.0]), np.array([1.0, 3.0, 1.0]))
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assert math.isnan(out[0])
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assert math.isclose(out[1], 20.0, abs_tol=1e-12)
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assert math.isclose(out[2], 22.5, abs_tol=1e-12)
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def test_alligator_constant_series_holds_at_median_price():
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# Median price = (11 + 9) / 2 = 10 on every candle, so all three SMMAs
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# seed at 10 and stay there.
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n = 30
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high = np.full(n, 11.0)
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low = np.full(n, 9.0)
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out = ta.Alligator(13, 8, 5).batch(high, low)
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assert out.shape == (n, 3)
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for row in out[12:]:
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assert math.isclose(row[0], 10.0, abs_tol=1e-12)
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assert math.isclose(row[1], 10.0, abs_tol=1e-12)
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assert math.isclose(row[2], 10.0, abs_tol=1e-12)
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def test_vidya_constant_series_holds_seed():
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# CMO = 0 on a flat series -> alpha = 0 -> VIDYA holds its seed value.
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out = ta.VIDYA(14, 4).batch(np.full(20, 42.0, dtype=np.float64))
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assert np.all(np.isnan(out[:4]))
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np.testing.assert_allclose(out[4:], 42.0, atol=1e-12)
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def test_zero_lag_macd_constant_series_converges_to_zero():
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# Each inner ZLEMA reproduces a constant, so macd, signal and histogram
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# are all 0 once the slowest branch warms up.
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out = ta.ZeroLagMACD(3, 5, 3).batch(np.full(60, 42.0, dtype=np.float64))
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# Take the last row and verify all three columns are 0.
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last = out[-1]
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assert math.isclose(last[0], 0.0, abs_tol=1e-12)
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assert math.isclose(last[1], 0.0, abs_tol=1e-12)
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assert math.isclose(last[2], 0.0, abs_tol=1e-12)
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def test_awesome_oscillator_histogram_flat_series_converges_to_zero():
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# Flat median price -> AO = 0 -> SMA(AO) = 0 -> AOHist = 0.
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n = 50
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high = np.full(n, 11.0)
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low = np.full(n, 9.0)
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out = ta.AwesomeOscillatorHistogram(3, 5, 3).batch(high, low)
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# warmup = slow + sma - 1 = 5 + 3 - 1 = 7.
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np.testing.assert_allclose(out[6:], 0.0, atol=1e-12)
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def test_stc_constant_series_yields_zero():
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# Flat input collapses both stochastic stages to zero -> STC stays at 0.
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out = ta.STC(3, 5, 4, 0.5).batch(np.full(60, 42.0, dtype=np.float64))
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ready = out[~np.isnan(out)]
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assert ready.size > 0
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np.testing.assert_array_equal(ready[-5:], np.zeros(5))
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def test_elder_impulse_constant_series_is_neutral():
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# Flat input -> neither EMA nor MACD histogram moves -> Impulse stays at 0.
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out = ta.ElderImpulse(13, 12, 26, 9).batch(np.full(120, 42.0, dtype=np.float64))
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ready = out[~np.isnan(out)]
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assert ready.size > 0
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np.testing.assert_array_equal(ready, np.zeros_like(ready))
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def test_cfo_perfect_linear_series_yields_zero():
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# LinReg of a perfectly linear series fits exactly, so CFO = 0 after warmup.
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out = ta.CFO(5).batch(np.arange(1.0, 21.0, dtype=np.float64) * 2.0)
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np.testing.assert_allclose(out[4:], 0.0, atol=1e-9)
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def test_apo_constant_series_converges_to_zero():
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# Both EMAs reproduce a constant exactly, so APO = 0 after warmup.
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out = ta.APO(3, 5).batch(np.full(30, 42.0, dtype=np.float64))
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assert np.all(np.isnan(out[:4]))
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np.testing.assert_allclose(out[4:], 0.0, atol=1e-12)
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def test_macd_constant_series_converges_to_zero():
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out = ta.MACD().batch(np.full(200, 100.0))
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# Last row's MACD and signal must be ~0.
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last = out[-1]
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assert math.isclose(last[0], 0.0, abs_tol=1e-9)
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assert math.isclose(last[1], 0.0, abs_tol=1e-9)
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assert math.isclose(last[2], 0.0, abs_tol=1e-9)
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def test_bollinger_constant_series_zero_width():
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out = ta.BollingerBands(20, 2.0).batch(np.full(50, 100.0))
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row = out[-1]
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np.testing.assert_allclose(row, [100.0, 100.0, 100.0, 0.0], atol=1e-12)
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def test_bollinger_upper_middle_lower_ordering():
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out = ta.BollingerBands(20, 2.0).batch(np.linspace(50.0, 150.0, 100))
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ready = out[~np.isnan(out[:, 0])]
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assert np.all(ready[:, 0] >= ready[:, 1])
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assert np.all(ready[:, 1] >= ready[:, 2])
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assert np.all(ready[:, 3] >= 0.0)
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def test_atr_constant_range_constant_output():
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high = np.full(30, 11.0)
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low = np.full(30, 9.0)
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close = np.full(30, 10.0)
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out = ta.ATR(14).batch(high, low, close)
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# Once seeded, ATR equals the constant TR of 2.
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np.testing.assert_allclose(out[13:], 2.0, atol=1e-12)
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def test_stochastic_extremes():
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# Close at the top of a 3-period range -> %K = 100.
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high = np.array([10.0, 11.0, 12.0])
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low = np.array([8.0, 9.0, 10.0])
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close = np.array([9.0, 10.0, 12.0])
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out = ta.Stochastic(3, 1).batch(high, low, close)
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assert math.isclose(out[2, 0], 100.0, abs_tol=1e-12)
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def test_obv_cumulative_known_sequence():
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close = np.array([10.0, 11.0, 10.5, 10.5, 12.0])
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volume = np.array([100.0, 20.0, 30.0, 40.0, 10.0])
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out = ta.OBV().batch(close, volume)
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np.testing.assert_allclose(out, [0.0, 20.0, -10.0, -10.0, 0.0])
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def test_percentage_trailing_stop_seed_and_ratchet():
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# 10% trail: first close 100 -> stop 90; next 110 -> stop max(90, 99) = 99.
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s = ta.PercentageTrailingStop(10.0)
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assert math.isclose(s.update(100.0), 90.0, abs_tol=1e-12)
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assert math.isclose(s.update(110.0), 99.0, abs_tol=1e-12)
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def test_step_trailing_stop_snaps_below_close():
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# step 1: floor((100.4 - 1) / 1) = 99.
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s = ta.StepTrailingStop(1.0)
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assert math.isclose(s.update(100.4), 99.0, abs_tol=1e-12)
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def test_renko_trailing_stop_holds_until_full_block():
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# block 1: seed 100 -> stop 99; 100.5 still 99; 101 -> stop 100.
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s = ta.RenkoTrailingStop(1.0)
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assert math.isclose(s.update(100.0), 99.0, abs_tol=1e-12)
|
||
assert math.isclose(s.update(100.5), 99.0, abs_tol=1e-12)
|
||
assert math.isclose(s.update(101.0), 100.0, abs_tol=1e-12)
|
||
|
||
|
||
def test_donchian_stop_window_extremes():
|
||
# 5-bar window of highs 1..5 and lows 0..4.
|
||
high = np.array([1.0, 2.0, 3.0, 4.0, 5.0])
|
||
low = np.array([0.0, 1.0, 2.0, 3.0, 4.0])
|
||
out = ta.DonchianStop(5).batch(high, low)
|
||
# First 4 rows NaN, fifth row: stop_long = 0, stop_short = 5.
|
||
for i in range(4):
|
||
assert math.isnan(out[i, 0])
|
||
assert math.isnan(out[i, 1])
|
||
assert math.isclose(out[4, 0], 0.0, abs_tol=1e-12)
|
||
assert math.isclose(out[4, 1], 5.0, abs_tol=1e-12)
|
||
|
||
|
||
def test_hilo_activator_flat_market_holds_low_sma():
|
||
# Flat candles H=11, L=9, C=10 -> close (10) sits between bands, so the
|
||
# initial long seed is preserved: emitted stop = lo_sma = 9.
|
||
h = np.full(15, 11.0)
|
||
l = np.full(15, 9.0)
|
||
c = np.full(15, 10.0)
|
||
out = ta.HiLoActivator(3).batch(h, l, c)
|
||
# warmup_period == period + 1 == 4, so indices 0..2 are NaN; index 3 onwards is 9.
|
||
for i in range(3):
|
||
assert math.isnan(out[i])
|
||
for i in range(3, 15):
|
||
assert math.isclose(out[i], 9.0, abs_tol=1e-12)
|
||
|
||
|
||
def test_volty_stop_flat_market_constant_level():
|
||
# ATR=2, mult=2 -> band 4; anchor stays at close 10 -> stop = 10 - 4 = 6.
|
||
h = np.full(20, 11.0)
|
||
l = np.full(20, 9.0)
|
||
c = np.full(20, 10.0)
|
||
out = ta.VoltyStop(5, 2.0).batch(h, l, c)
|
||
for i in range(4):
|
||
assert math.isnan(out[i])
|
||
for i in range(4, 20):
|
||
assert math.isclose(out[i], 6.0, abs_tol=1e-12)
|
||
|
||
|
||
def test_yoyo_exit_flat_market_constant_level():
|
||
# ATR=2, mult=2 -> band 4; trail = close - band = 10 - 4 = 6 and holds.
|
||
h = np.full(20, 11.0)
|
||
l = np.full(20, 9.0)
|
||
c = np.full(20, 10.0)
|
||
out = ta.YoyoExit(5, 2.0).batch(h, l, c)
|
||
for i in range(4):
|
||
assert math.isnan(out[i])
|
||
for i in range(4, 20):
|
||
assert math.isclose(out[i], 6.0, abs_tol=1e-12)
|
||
|
||
|
||
def test_rvi_volatility_pure_uptrend_saturates_at_one_hundred():
|
||
# Strictly rising closes -> every stddev sample classified as "up" ->
|
||
# RVIVolatility saturates at 100. Renamed from the original ta.RVI in
|
||
# PR 42 to disambiguate from Family 02's Relative Vigor Index, which
|
||
# now owns the short ta.RVI name (candle input).
|
||
out = ta.RVIVolatility(5).batch(np.arange(1.0, 41.0, dtype=np.float64))
|
||
ready = out[~np.isnan(out)]
|
||
assert ready.size > 0
|
||
np.testing.assert_allclose(ready[-10:], 100.0, atol=1e-9)
|
||
|
||
|
||
def test_parkinson_volatility_zero_range_yields_zero():
|
||
# H == L every bar -> ln(H/L) = 0 -> Parkinson sigma is zero.
|
||
h = np.full(30, 10.0)
|
||
l = np.full(30, 10.0)
|
||
out = ta.ParkinsonVolatility(14, 252).batch(h, l)
|
||
ready = out[~np.isnan(out)]
|
||
assert ready.size > 0
|
||
np.testing.assert_allclose(ready, 0.0, atol=1e-12)
|
||
|
||
|
||
def test_garman_klass_zero_movement_yields_zero():
|
||
# O == H == L == C every bar -> both log terms are zero -> sigma is zero.
|
||
o = np.full(30, 10.0)
|
||
h = np.full(30, 10.0)
|
||
l = np.full(30, 10.0)
|
||
c = np.full(30, 10.0)
|
||
out = ta.GarmanKlassVolatility(14, 252).batch(o, h, l, c)
|
||
ready = out[~np.isnan(out)]
|
||
assert ready.size > 0
|
||
np.testing.assert_allclose(ready, 0.0, atol=1e-12)
|
||
|
||
|
||
def test_rogers_satchell_zero_movement_yields_zero():
|
||
o = np.full(30, 10.0)
|
||
h = np.full(30, 10.0)
|
||
l = np.full(30, 10.0)
|
||
c = np.full(30, 10.0)
|
||
out = ta.RogersSatchellVolatility(14, 252).batch(o, h, l, c)
|
||
ready = out[~np.isnan(out)]
|
||
assert ready.size > 0
|
||
np.testing.assert_allclose(ready, 0.0, atol=1e-12)
|
||
|
||
|
||
def test_yang_zhang_zero_movement_yields_zero():
|
||
# O == H == L == C and constant across bars -> every sub-component is
|
||
# zero -> Yang-Zhang sigma is zero.
|
||
o = np.full(30, 10.0)
|
||
h = np.full(30, 10.0)
|
||
l = np.full(30, 10.0)
|
||
c = np.full(30, 10.0)
|
||
out = ta.YangZhangVolatility(14, 252).batch(o, h, l, c)
|
||
ready = out[~np.isnan(out)]
|
||
assert ready.size > 0
|
||
np.testing.assert_allclose(ready, 0.0, atol=1e-12)
|