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Difficulty: Hard
Category: machine_learning
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Topics: market_microstructure, vpin, order_flow, high_frequency
The Volume-Synchronized Probability of Informed Trading (VPIN) is a high-frequency market microstructure metric used to estimate order flow toxicity by measuring order imbalances within volume-based buckets. By utilizing a volume clock instead of time bars, VPIN aligns with the speed of information arrival, making it a robust tool for predicting market volatility and liquidity crashes. Task Implement a function solution(trades, bucket_volume, window_size) that calculates the rolling VPIN metric
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