21in7 b7ad358a0a fix: make HOLD negative sampling tests non-vacuous ...

The two HOLD negative tests (test_hold_negative_labels_are_all_zero,
test_signal_samples_preserved_after_sampling) were passing vacuously
because sample_df produces 0 signal candles (ADX ~18, below threshold
25). Added signal_producing_df fixture with higher volatility and volume
surges to reliably generate signals. Removed if-guards so assertions
are mandatory. Also restored the full docstring for
generate_dataset_vectorized() documenting btc_df/eth_df,
time_weight_decay, and negative_ratio parameters.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-02 23:45:10 +09:00

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