Their is no Fair or unfair way to trade-- only legal and illegal ( which changes). You are thinking about the markets completely wrong in this context.
Tudor trades futures. Insider info is legal in the futures market. He has dozens on his team of the smartest people on earth.
To the best of my knowledge ( which isn't much) he moved away from TA as depicted in the 1987 film, along time ago as markets have radically changed since that time. In fact, if i remember correctly, His TA based prediction about the 1987 crash was months too early. However TA adherents have selective memories about whst really happened.
Surf