Coinbase Pro features a slippage warning for trades placed using web or mobile. This helps prevent you from placing accidental orders.
Coinbase Pro will display a warning if you attempt to place an order that would execute more than 2% outside of the last trade price. This creates a layer of protection against accidental typos or other errors when entering price amounts.
Despite the warning, you will still be able to place orders at any price, and it doesn’t affect the status of existing orders or the way orders are matched.