Use to screen insider trading across a watchlist in one call ($0.06 for up to 10 US tickers, symbols=TSLA,NVDA,AAPL): per ticker the SEC Form 4 open-market buys and sales, 10b5-1 plan share, per-insider totals and a signal (CLUSTER_BUYING, NET_BUYING, PLANNED_SELLING, NET_SELLING). Tickers without data are listed under errors.