Edit the book's venue, instrument type, symbol, and instrument name, or the orders account, in the JSON below. live_market_data arguments are (venue, instrument_type, data_kind, symbol, instrument_name). List presets request instrument definitions through live_market_data with wildcard selectors; the spreads preset filters for Synthetic instruments. List requests start live subscriptions and print snapshots and updates. Use a different subscription_id for each active subscription, or unsubscribe before reusing it.
Warning: create spread, enter order, modify order, and delete order change live Spark state. Review IDs, account, price, and quantity before sending.