Data source: this one's not a proxy — it streams directly from Hyperliquid's free public API (api.hyperliquid.xyz), no account or key required. Price comes from their live allMids feed and volume comes from aggregating their real trade tape per market, so this reflects actual activity on the exchange itself. Two notification modes: "in-tab" uses this page's own detection and only works while the tab is open (even in the background). "Push" is monitored by the server itself and will notify you even with the browser fully closed — but it uses a fixed threshold configured on the server, not the slider below, and plays your OS's default notification sound rather than the custom beep.