I'm learning a better way to describe trade offers on a normal exchange - maybe it will help: Order specifies volume only (spot trade): trader gets best price first, then next best etc. until volume reached. If there's low liquidity, this can be dangerous. Order specifies price only: with no volume, this is meaningless (or you could assume 1CC i guess) Order specifies price and volume: I think this would be seen as a guaranteed price limit, so trader gets best price etc, until the price limit is reached (or volume reached). So, all of that shows that volume is essential in any offer to trade.

The wording used there is meant to be applicable to both buyers and sellers.