Spoofing laws hinge on "intent". Like literally the exact same behaviors have a different legal status based on "why" you did it.
The way spoofing rules are usually proven is via examinations of patterns (like do you only do the cancel trick when it directly moves markets into your real position) or via old fashioned examination of documents (did you send an email that said "Let's spoof this market like crazy").
The way spoofing rules are usually proven is via examinations of patterns (like do you only do the cancel trick when it directly moves markets into your real position) or via old fashioned examination of documents (did you send an email that said "Let's spoof this market like crazy").