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Understanding insider signals
Form 3/4/5 signals, trading plan detection, and forward-return scores.
We parse Forms 3/4/5 and weight by transaction type, size, role, timing, and 10b5-1 plan status.
Non-plan open-market buys by senior execs carry the strongest positive signal.
Clusters of selling outside 10b5-1 plans can indicate caution; plan sales are down-weighted.
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