The best replacement for ameritrade is etrade.

The best alternatives to ameritrade are rated as following:
★★★★★  etrade
★★★★  scottrade
★★★★  fidelity
★★  vanguard
★★  sharebuilder
★★  schwab
★  tradeking
★  charles schwab
★  optionshouse
★  interactive brokers
★  usaa
★  optionsxpress
★  ameriprise
★  scott trade
  merrill lynch
  fidelity ira
  td waterhouse
  e trade
  waterhouse
  scottrade better
  zecco
  ameritrade plus
  e-trade

Your alternative for ameritrade is not listed? Suggest!
Speaking about ameritrade, one probably shouldn't forget about ninjatrader.

Other search terms related to ameritrade and their ratings are:
★★★★★ ninjatrader
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