What this is
OnChain Insider watches Polymarket for a specific pattern: a wallet builds a position shortly before a sharp price move, and the same wallet, or wallets funded from the same place, keep doing it. Every trade on the platform is ingested. Watched markets get price snapshots every minute and a break detector. When a break confirms, the wallets holding the right side beforehand get screened, scored and grouped into actors. Alerts fire when a high-tier actor opens a new position that fits its own past behaviour.
What this is not
Nothing here is an accusation. A flagged wallet is a statistical anomaly in public blockchain data, and anomalies have boring explanations most of the time: luck, skill, a hedge, a bot, a person who reads the news faster than you. The app never tries to work out who is behind an address, and it never will. It does not place trades and it is not financial advice. If you trade on what you see here, that is your call and your risk.