which was a quoting mechanism that DirectEdge experimented with in 2009 Could you go into more detail about what you mean by that? Unless you're being pedanti

which was a quoting mechanism that DirectEdge experimented with in 2009 Could you go into more detail about what you mean by that? Unless you're being pedantic about something specific, I don't get how you could say that. Flash trading (in several variations) is basically the only thing Direct Edge offers, and they currently carry roughly 12% of the market's daily trading volume.