AEMO dispatch files change every five minutes. Generators rebid capacity constantly. Some of it material, most of it noise. gridIQ flags the rebids that move price: anything over a 500 MW capacity shift, with 90 days of archive.
By default, any DUID changing its advertised maximum availability by more than 500 MW between consecutive dispatch intervals. Tunable per customer on Enterprise. Rebids below threshold are still stored for forensic analysis via the bid history feed but aren't surfaced in the live monitor.
Inside the app at /rebids. Programmatic access via the gridIQ API (ask Watt "show me significant rebids for VIC in the last hour" and the rebid data set is queried directly). Webhooks on individual DUIDs or fuel-type thresholds are included too — alerts ship in every gridIQ API tier.
A 500 MW withdrawal ahead of a peak is frequently a setup for price-moving behaviour. Monitoring rebids in real time turns what used to be next-week analysis (after bid history publishes on a 4-day lag) into live signal.