Trader's Tip: Large exchanges will likely have two things that traders want, 1) hopefully more safety, Mt. Gox and BTC-e notwithstanding :-/ and importantly 2) higher trading volume in the pairs we are interested in trading, this equals order liquidity, a good thing. I see people asking for all kinds of exchanges to be added to leonArdo, perhaps for the wrong reasons. You should make yourself familiar with the regulations governing crypto exchanges, if any, of the country where your exchange is located.