Composite 0-100 metric across four sub-indices: Demand (WSTS 3MMA YoY → Semiconductor Cycle), Concentration (CSET weighted HHI → Chokepoint Anatomy), Capacity (FRED CAPUTLG3344S utilization), Power (PJM DC-region queue/operational ratio → Compute Supply Model). Equal default weights, user-adjustable; monthly series begin at the earliest date all four sub-index sources are available. A single number capturing concentration and capacity pressure in the AI compute supply chain right now. Demand pressure (WSTS billings) and factory utilization (FRED) compose against production concentration (CSET HHI) and power-queue gaps in datacenter regions (PJM); higher composites mean tighter conditions, and the sub-components show exactly where the pressure is and which chokepoints policy can address.