Funnily enough I've been involved in this argument a number of times on this forum. Front Running is not illegal, order flow can be purchased, and even institut

Funnily enough I've been involved in this argument a number of times on this forum. Front Running is not illegal, order flow can be purchased, and even institutional investors are unable to buy portions of millions of stock in one go. You can theoretically front-run part of that order if your algorithms analysing orders think that a big order is following current ones. People will argue front running is illegal because the first few results on google have misconstrued the idea with insider trading but if you dive into some financial books you'll find as a concept it's legal, but there are illegal ways of doing it. edit: found the article quoted last time I discussed this. https://blogs.cfainstitute.org/investor/2013/04/24/what-to-do-about-high-frequency-trading/ https://blogs.cfainstitute.org/investor/2013/04/24/what-to-d... Larry Harris, Professor of Finance as USC;LA says "A few high-frequency traders front-run buy-side traders who are working orders, thereby making the latter’s trades more expensive. Such activities are legal if the high-frequency traders do not improperly obtain information about the orders they front-run."