Here are some ways you can tell if you have an ECN account:
1. They usually have non Fixed Spreads, all ECN brokers should have non fixed spreads.
2. They usually charge commission with non fixed spreads, if they don’t charge a commission please ask yourself how they stay in business.
3. They have rollover, all ECN’s will have to disconnect for 5-10 minutes at 5pm EST. If you can still place a trade at this time I would be wondering how they are getting quotes through, they are most likely taking the other side so that the trade goes through.
4. Finally, look for “requotes.” I have heard that some market makers or deal desks cancel demo and live accounts due to the trader’s profitability.
If you have anything else to add, please Contact Mike