Binance’s New Rule Could Have Prevented the $19 Billion October Crash

Binance is introducing the Spot Price Range Execution Rule (PRER), a new mechanism designed to prevent taker orders from executing outside a dynamic fair-value band. This rule, set to be gradually implemented starting April 14, 2026, directly addresses issues seen during the October 10, 2025 flash crash, which saw over $19.13 billion in leveraged positions liquidated. During that event, assets like Cosmos (ATOM) briefly traded near zero due to stale limit orders filling at extreme prices. Binance had to compensate users with $283 million for de-pegged assets and an additional $400 million through its 'Together Initiative' for liquidation losses. The PRER mechanism works by establishing a dynamic reference price based on recent trades and setting configurable bands. Taker orders falling outside these bands will expire instead of executing at abnormal prices, while maker orders remain unaffected. Binance will roll out PRER pair by pair, and API users will be able to access real-time reference prices and band parameters. While PRER offers a protective layer against extreme fills, it does not eliminate overall crypto trading volatility or leverage risks.

(Source：BeInCrypto)