dark pool is rigged by prop firms (market makers). u don't have the "edge" to overide the rigged. comprende. have some mojitos
You are correct, both limit orders and market orders are now toxic, which eliminates scalping, and market making as viable strategies. However, we can still be profitable, I wrote this article for CFA magazine last year, which outlines some necessary trading adjustments. These adjustments have helped to keep me profitable. http://www.defendtrading.com/cfm.v21.n4.16.pdf