Streetwise Professor » Spoof Me Once, Shame on You: Spoof Me Twice, Shame on Me: "I’ve often written that HFT firms are the best able to detect spoofers, and to take preventative measures (which reduce the profitability of spoofing, and hence its prevalence). The whole business of HFT is extracting signals from orders and order flow, and trading accordingly. Spoofing is based on manipulating the order flow–in essence, injecting noise into it. HFT firms evaluate their executions, and attempt to identify patterns that predict both winning and losing trades. If spoofers systematically impose losses on HFT firms, eventually the latter will figure it out."
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