Midpoint_West is an intertie scheduling constraintthat appears as a congestion constraint in the California ISO market. When power flow reaches this element's operating limit, CAISO's market optimization assigns it a shadow price — the cost to the system of that limit binding — which in turn drives locational price separation around it.
Across the market intervals retained in this dataset, it has bound 5 times, with the largest shadow price observed at $1440.39/MWh on 2026-07-25. Prices are shown with the sign CAISO publishes; magnitude is the severity signal.
Data comes from CAISO OASIS (PRC_CNSTR) for both the day-ahead and real-time markets, refreshed automatically. This page is informational only and is not trading, financial, or operational advice.