Where to find tradebullet software

Do we need to buy the software? Otherwise how can we autotrade?

BTW, I already set up auto trade for my ib account. However it never asked me for my userid and password. Then how can I autotrade?

I don’t understand what you mean: you want to know where to get TradeBullet or did you already set it up? You should contact support@tradebullet.com directly for TB questions as this forum is not monitored as often.