The Pilot’s Book · Trade
The warehouse
A warehouse of 120 m³ in any port: rent is paid once, on the first deposit. «Store all» and «Take all» for each good.
The warehouse is under «Holdings» in the port window's second row. 
Each good in the hold has «Store all» and «Take all». The first deposit pays the rent: 60 + 24 a level, never more than 300. 
The warehouse holds 120 m³. Keep goods there to wait for a better price, to stay under the overload line, or to take the passage with a light hold.
See also
The hold and overloadTrade goods over half the hold (three quarters on a trader's hull) — overload, −20 % speed. Over the brim — −35 %. Ship's stores do not count.4 steps
The passage's rulesOnce in 30 minutes. Under the pirate flag ×2, towards a quest's goal ×0.25. Not with skulls, not in a fight, and not with trade goods over 60 % of the hold.4 steps
The exchange and the auctionIn bigger ports the «Exchange»: forwards, buy orders and the bank. In the Free Harbors the trophy auction: 10-minute lots, the house keeps a tenth.5 steps