I use Interactive Brokers. IBKR provides hidden orders as an option. What are appropriate situations to use hidden orders? I would like to know for the context of Hong Kong stocks, Australian stocks and U.S stocks.
IMO, I would never use a hidden order. Your price can have trade throughs with no price protection on other exchanges. In an order where you want to buy a large block of stock in an illiquid symbol where the market makers might jump in front of you by a penny, I would consider an iceberg order. E.g. Buy 10,000 XYZ show 100. That way my price is visible but not my size. My only experience is with US stocks.