Market Microstructure & L2 Orderbook Dynamics

Level-2 orderbook depth ladders, bid-ask spread elasticity, order flow toxicity (VPIN), and market impact thresholds.

LEVEL-2 LIMIT ORDER BOOK DEPTH LADDER

ASK 100.0514,500 VOL

ASK 100.0422,100 VOL

ASK 100.0318,400 VOL

ASK 100.0235,000 VOL

ASK 100.0141,200 VOL

MID PRICE: 100.00 | SPREAD: $0.02

BID 99.9948,100 VOL

BID 99.9831,400 VOL

BID 99.9719,800 VOL

BID 99.9625,600 VOL

BID 99.9512,300 VOL

VPIN TOXICITY & INFORMATION LEAKAGE

VPIN TOXICITY ESTIMATE: 0.4620

Volume-Synchronized Probability of Toxicity (VPIN) quantifies institutional order flow imbalance: $$ \text{VPIN} = \frac{\sum_{\tau=1}^N |V_\tau^B - V_\tau^S|}{N \cdot V} $$ At critical VPIN thresholds ($> 0.70$), market makers widen spreads or withdraw liquidity to avoid adverse selection.