SEBI Market Closing Auction & Imbalance Simulator

NSE/BSE Closing 15-Min Call Session & Market Surveillance Engine
Order Injection Engine SEBI Rulebook
Closing Manipulation Lab
Data Export & Persistence
Closing Call Auction Price Discovery (Cumulative Curves) ACTIVE UNCROSSING
Uncrossing Price ₹1,500.00
Matched Tradable Vol 26,000
Unmatched Imbalance 7,000 (BUY)
Benchmark VWAP ₹1,500.50
Limit Order Book Depth (LOB)
BIDS (BUY ORDERS)
QtyPrice
ASKS (SELL ORDERS)
PriceQty
SEBI Surveillance Diagnostic
CLEAR_NO_MANIPULATION_DETECTED
Order flow pattern adheres to standard equilibrium price discovery rules.
Manipulation Risk Score: 0.12 (Low)
VWAP Deviation: -0.03%
Order Imbalance Ratio: 21.2%
Order Cancellation Velocity: Low (< 5%)
Uncrossing Logic Mechanics

Per SEBI call auction guidelines for Indian equity markets:

  1. Max Executable Volume: Price that yields highest cumulative matched quantity.
  2. Min Imbalance: If tie, pick price with minimum surplus/unmatched order volume.
  3. Market Reference: If further tie, pick price closest to continuous session benchmark VWAP.
State Proof Mirror
-- INITIALIZING STATE --
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