Every coin transfer on Sui is matched against labeled exchange addresses (hot wallets and user deposit addresses for 46 exchanges). A transfer from an outside wallet to an exchange is a deposit; the reverse is a withdrawal. Moves between two exchange addresses, such as deposit sweeps, are left out. A positive net means more value moved onto exchanges, which usually comes before selling; a negative net means coins are leaving for self-custody or DeFi. Values are in USD at each day's price.