I guess you should know that "see" is metaphor in OP post.
Quote from emg:
Let start with the definition of discount broker:
In the securities industry, a discount brokerage helps clients buy and sell securities on a stock exchange. Discount brokerages usually allow their clients to trade for their own account with little or no action with a live broker.
This is pure and simple. If you don't want your broker to see your trades, they will not let u use their server. Simple as that
