If this is a dumb question, I apologise in advance. Say someone actually came up with a great trading system (discretionary), but it could be quite easily reverse engineered by the broker one trades through if the broker actually wanted to do it if he saw your account size mushroom. I'm not sure if employees can monitor individual customer's trading activity? Anyway, is it necessary to seperate the trade out across two brokerages in order to hide your system? It makes position and account management a pain but was wondering about the necessity of doing such a thing, and the minus of not doing it? Thanks.