Where a tokenized stock is cheapest: each issuer's token (ST0x, Coinbase, Robinhood) priced per share for a $100 buy, against the stock's own price (US, or the home exchange's in dollars), with the gap in % and the lowest issuer. From quotes taken every 5 minutes (biggest stocks) or hourly; the time is in the answer. Not a live quote: for an executable best-price buy use trade_link with usd. Up to 12 tickers.