On 16 February 2021 at 08:00 UTC, we will be introducing the Fat Finger Protection Trading Rule. The rule applies to both Market and Limit orders.  Market orders will be restricted by the maximum Impact Price of:  - Buy orders: 5% above Best Ask or Mark Price (whichever is higher)- Sell orders: 5% below Best Bid or Mark Price (whichever is lower) Users will have their limit order rejected should an order meet the below criteria: - Buy orders: Limit price is more than 5% above Best Ask or Mark Price (whichever is higher) and order size is larger than the current Best Ask size.- Sell orders: Limit price is more than 5% below Best Bid or Mark Price (whichever is lower) and order size is larger than current Best Bid size. Please see our blog for more information.