The 390 Professional Orders Rule is a regulatory guideline established by the Chicago Board Options Exchange (CBOE) to classify high-frequency options traders as professional Trader.
Customers are classified as professional Traders if they place an average of 390 option orders per trading day in a calendar month within a quarter.
Moomoo does not support professional trading currently. If you qualify as a professional trader according to the 390 Rule, your accounts will then be limited to position close only for the next 3 months or for 1 quarter.
How Orders Are Counted Under the 390 Rule
Every submitted options order—whether filled, rejected, or canceled—counts toward the 390-order threshold, including:
1. Single-Leg Orders
Each individual buy or sell order is counted separately.
2. Complex Orders
• 8 legs or fewer → Counts as 1 order
• 9 legs or more → Each leg counts as a separate order
3. Cancel and Replace Orders
• Each modification counts as a new order
• Exceptions apply when replacing "child" orders within a parent-child structure
4. Pegged Orders
Orders that adjust based on Best Bid Offer (BBO) or National Best Bid and Offer (NBBO) count as a new order each time they update.
For a full breakdown of order classifications, refer to the CBOE Regulatory Notice:
