Research · honest validation
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Step 3 of 5 · Strategy checks · Validation
Read the verdict first, then inspect OOS / WF / MC evidence
When done → step 4: Paper run · Paper Trading
N4 L1 降级：统一 TCA 成本拆解 + flat/adaptive 对照 + 手数冲击情景。非共址 HFT，非 Level-2。