By The Optimal Top N BBO Price Order function, it means that users can place orders based on BBO price, which users can place order faster and get it fulfilled immediately only by selecting desired price level among “top 5 optimal BBO price”, “top 10 optimal BBO price” or “top 20 optimal BBO price” and enter contract quantity. No need to take the trouble judging and entering order price. The unfilled part is automatically converted into a pending order and waiting for a deal.

The Optimal Top N BBO Price Order function is available for both opening and closing position in both limit order and trigger order, enabling faster transaction and helping user seize potential big market move.

The specific operation method of WEB page:

1. For Limit Order, please select the desired optimal price level, enter contract quantity and click Open Long or Open Short to take order. 

2. For Trigger Order, please set a trigger price, select the desired optimal price level, enter contract quantity and click Open Long or Open Short to take order.

The specific operation method of APP page：

1. For Limit Order, please click BBO price, select the desired optimal price level, enter contract quantity and click Open Long or Open Short to take order.
2. For Trigger Order, please set a trigger price, click BBO price, select the desired optimal price level, enter contract quantity and click Open Long or Open Short to take order.

Note: When the margin ratio of the user's position is low or the market volatility is large, if the system determines that The Optimal Top N BBO Price of the opponent's market will cause the user to close the position, the margin ratio will be less than 0. The Optimal Top N BBO Price order will be invalid (that is, unavailable).