There is a simple flag you can set (it&#x27;s called &quot;Add Liquidity Only&quot; or &quot;Post Only&quot;, depending on the venue) which will result in HFT&#x27;s never trading with you. Strangely, most &quot;real traders&quot; never set this flag.<p><a href="https:&#x2F;&#x2F;www.chrisstucchio.com&#x2F;blog&#x2F;2014&#x2F;how_to_not_get_ripped_off_by_hft.html" rel="nofollow">https:&#x2F;&#x2F;www.chrisstucchio.com&#x2F;blog&#x2F;2014&#x2F;how_to_not_get_rippe...</a><p>The reason is that it&#x27;s not a matter of waiting a whole second and being guaranteed a fill. It&#x27;s placing an order and accepting execution risk; maybe you get a fill, maybe you are stuck holding a tanking stock.