The OTC Desk and the Record of a Large Trade
Large trades are often done away from public exchanges, through an over-the-counter desk, precisely to avoid moving the market and drawing attention. The trade is private from the order book, but it is not private from the desk, or from the records the desk must keep.
An OTC desk identifies its counterparties, records the size and the settlement, and is itself subject to reporting and to breach. The discretion is from other traders, not from the institution, the regulator, or anyone who later obtains its data.
The settlement also touches the chain. Coins move to or from addresses, and a large, well-timed movement around a known desk can be inferred even without the desk's records, by anyone watching the chain closely.
The useful understanding is that privacy from the market is not privacy from the record. A large trade is known to the parties that matter, and its on-chain shadow is visible to the patient.
We trace what a client's significant movements disclose, on-chain and through the institutions that handle them, so a discreet trade is understood for what it still reveals.