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OrderFlowDiT: Transport-Regularized Diffusion Transformer for Probabilistic Limit-Order Supply Forecasting

Jung Hun Phee, Tucker Balch · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.22727 · cited by 0 works (OpenAlex) · open-access PDF

German

Wir untersuchen die bedingte Verteilung des in den nächsten fünf Minuten eingereichten Limit-Ordersvolumens, angesichts des aktuellen Bestellbuchs und des jüngsten Auftragsflusses. Die Aufgabe erfordert die Erfassung von Preisplatzierung, Gesamtvolumen und vorausschauende Unsicherheit gemeinsam. Koordinierte Diffusionsverluste berücksichtigen nicht explizit die Preisverlagerung, während die Normalisierung von Feldern zur Einheit Masse Informationen über das Gesamtvolumen entfernt. Die Vereinbarung über ausgewählte Zusammenfassungsstatistiken schafft auch keine Treue zur gemeinsamen Feldverteilung. Wir führen OrderFlowDiT ein, einen bedingten Diffusionstransformator für unnormalisierte Gebühren und fragen nach Volumenpreisfeldern, die mit einem ungleichmäßig optimalen Transport (U

Machine translation (Meta M2M100); the English original follows.

Abstract

We study the conditional distribution of limit-order volume submitted over the next five minutes, given the current order book and recent order flow. The task requires capturing price placement, total volume, and predictive uncertainty jointly. Coordinate-wise diffusion losses do not explicitly account for price displacement, while normalizing fields to unit mass removes information about total volume. Agreement on selected summary statistics also does not establish fidelity to the joint field distribution. We introduce OrderFlowDiT, a conditional Diffusion Transformer for unnormalized bid and ask volume-at-price fields, trained with an unbalanced optimal-transport (UOT) auxiliary loss. We also develop a full-field evaluation framework that combines a transport cost sensitive to price placement and total volume with proper scoring rules and calibration diagnostics. In the primary comparison on 1950 validation conditions across 30 U.S. equities, adding UOT reduces full-field transport cost by 45.8% and the transport energy score by 26.1% relative to training with mean squared error alone. Both measures improve for every stock. These findings support incorporating price geometry and volume into generative modeling, with field accuracy and predictive uncertainty evaluated together.

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Topics: Scoring rule, Computer science, Probabilistic logic, Calibration, Bayesian probability, Joint probability distribution

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