- DSR warm-up: skip first 50 steps when EMA has insufficient history
- Phase Fast num_atoms: 51 → 101 (H100 can afford finer resolution,
1.19 per atom vs 2.35 — critical for distinguishing Q-values)
- Argo template: clear stale feature cache before hyperopt (ensures
fresh computation with VPIN/trades enrichment)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
ROOT CAUSE: 5 interlocking bugs made learning impossible:
1. DSR denominator floor 1e-12 produced values in millions → drowned all signal
2. Global [-1,+1] clamp destroyed Bellman equation signal (can't distinguish
catastrophic loss from mild loss)
3. v_range=20 exactly equals V_max for gamma=0.95 → Bellman target pins at
ceiling → Q-values saturate → Q-gap collapses to 0.0000
4. num_atoms=11 over 40-unit range = 4.0 per atom (C51 paper min is 51)
5. 6/7 reward components were penalties → mean_reward=-0.311 regardless of action
FIXES:
- DSR denominator floor: 1e-12 → 0.01 (prevents million-scale spikes)
- Each component individually clamped BEFORE weighting (DSR to [-1,+1],
z-score to [-3,+3], drawdown to [0,1], time decay to [0,0.3])
- Removed global [-1,+1] clamp (no longer needed with bounded components)
- profit_take_bonus: 0.1 → 0.01 (was 100x too large, caused reward hacking)
- Removed confidence scaling (positive feedback loop destabilized learning)
- Removed regime scaling (non-stationary reward confused the model)
- Dynamic v_range from gamma: v_range = 2.5/(1-gamma)*1.2 (always covers Q range)
- num_atoms minimum: 11 → 51 (C51 paper standard)
- gamma default: 0.99 → 0.95
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Q-gap was 0.0 (disabled) meaning the model traded on every bar regardless
of conviction. With 0.1, the model must have Q(best) - Q(flat) > 0.1
before entering a position. Local test showed 21% fewer trades.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add q_gap_threshold to action selection kernel: when greedy Q(best) - Q(flat)
< threshold, default to flat. Teaches model to trade only with conviction.
39D search space (was 38D). Default 0.0 (disabled), hyperopt range [0.0, 0.5].
Remove use_branching parameter from experience_action_select — GPU pipeline
always uses branching DQN. Flat mode was dead code.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
6% drawdown tolerance too generous for HFT. Tightened search range
to 0.5%-3%, default 1%. Forces aggressive loss cutting.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add 7 composite reward fields to DQNHyperparameters: w_dsr, w_pnl,
w_dd, w_idle, dd_threshold, loss_aversion, time_decay_rate.
Add RewardSection to training_profile.rs with Option<f64> fields and
apply_to() mapping. Add [reward] section to all 3 DQN TOML profiles
(production, smoketest, hyperopt) with identical defaults.
Remove hold_reward from ExperienceSection (replaced by w_idle).
Add 7 reward search bounds to SearchSpaceSection and bound() match.
Add 7 reward phase_fast defaults to PhaseFastSection.
hold_penalty kept as deprecated field for hyperopt adapter compat
(Task 4 will clean it up).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Smoke test loads all hyperparams from TOML profile instead of hardcoding.
TOML: hidden_dim=64, batch=64, lr=0.0003 (stable on RTX 3050 + H100).
Restored check_err() drain in device.rs — required to clear stale CUDA
errors from primary context reuse between tests.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Production defaults are sufficient for hyperopt exploration. Larger networks
can be tested in a separate phase with the best hyperparams found.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add SearchSpaceSection, PsoSection, HyperoptProfile structs to
training_profile.rs. All 31 PSO search bounds now configurable in
config/training/dqn-hyperopt.toml — no code changes needed to
adjust search ranges.
HyperoptProfile::bound("field", default) returns the TOML value
or falls back to the hardcoded default. Adapter wiring is next step.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
