order_book.{market_symbol}.{feed_type}@15@{refresh_rate}[@{price_tick}]
order_book.{market_symbol}.{feed_type}@15@{refresh_rate}[@{price_tick}]
order_book.{market_symbol}.{feed_type}@15@{refresh_rate}[@{price_tick}]
Symbol of the market (e.g., BTC-PERP)
Rate of sending updates (used in BBO channels)