Trading
Self-Trade Prevention
Trades between the same address cancel the resting order instead of causing a fill. No fees are deducted, nor does the the cancel show up in the trade feed.
On CEXs this behavior is often labeled as “expire maker.” This is a commonly preferred behavior for market making algorithms, where the aggressing order would like to continue getting fills against liquidity behind the maker order up until the limit price.
Learn more at https://hyperliquid.gitbook.io/hyperliquid-docs/trading/self-trade-prevention