An ECN broker may require you to have a higher minimum deposit. They may also charge higher trading fees, this is because opening and closing an ECN trade can be more expensive at ECN brokers than a market makers. Ex: Some ECN brokers charge $8/lot + spread for roundturn trade, which is almost the same as the spread that some brokers like 0.9 pips spread for EURUSD that market maker broker XM charge with their Ultra Low account.