Every time I&#x27;ve looked into the mechanics of paying for order flow, it was just a pay-to-play dark pool with certain extra requirements (e.g. you must match X% of trades). Do you have documentation on a brokerage that provides some sort of &quot;first peek&quot; mechanics that might allow frontrunning?<p>I think we are in agreement that the main purpose of buying order flow is to price discriminate based on delta toxicity.