Ya I use 4 different brokerages and each one has their differences for sure - ameritrade changed a lot of their policies this year I was reading on it at the time I noticed the changes so I very seldom use that for frequent 'trading' i.e. OTC. Fidelity is also bad for OTC purchasing of sub pennies. There is a limitation on amounts such as: 9,999,999 limit vs 10m ... It's weird but each has their good and bad points.
News 
Market Data 
Discover 
