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See http://www.bloombergview.com/articles/2015-10-08/why-do-high-frequency-traders-cancel-so-many-orders- http://www.bloombergview.com/articles/2015-10-08/why-d

• MichaelGG 11y ago
  Yeah and the ratios are already limited by exchanges and the SEC tracks it nicely: http://www.sec.gov/marketstructure/datavis/ma_exchange_canceltotrade.html http://www.sec.gov/marketstructure/datavis/ma_exchange_cance... Some exchanges have a far higher ratio. Instead of ~10 (90%) it's ~150 (99.3%). But there's probably a good reason for this.