Quick question from a Newbie, if you are trading a pair containing two cryptos with differing 'Market fees' specified like OPEN.BTC (0.2%) / BitUSD (0%) it would be assumed the total cost for this trade would be 0.2%. However if BitUSD had a 0.2% fee then the total would be 0.4% in trade fees is this correct? 0.2% deducted either side, and if one was 0.3% then it would have 0.3% deducted from one side?
Also, in the above example of OPEN.BTC and BitUSD, when I exchange 1 OPEN.BTC for say 1000 BitUSD, how are the fees deducted? For example do I end up paying 1 OPEN.BTC for 998 BitUSD or 0.998 OPEN BTC for 1000 BitUSD?