No front running is when you're trades get beaten by milliseconds there for preventing you from getting a good execution rate. You end up trading a penny after what you're trade would be if you were not getting front runned. Not all brokers sell your data though.
Scalpertern, learn to trade. Listen to the veterans on this board and learn to trade. No one is front running your data. Read my first post and my last - you'll learn much.
