Sometimes I hear talks about volume, market depth and order flows. Well that’s all good and neat but who can see this information? I mean, banks can only see the order flows and market depth only from other banks they deal with in the interbank market. There is no universal centralized tool for it or am I wrong? And retail brokers can’t see sh*t and the depth or volume they provide is within their own client base at best. Or am I wrong again?