Can someone explain trading bots to me?

I just entered into one using only 15$ to see what happens. I am down 1.7$

What does grid profit mean? I thought I would have the same profit as the grid but actually that is not the case.

Also i thought that the trading bot will buy and sell on its own but again this has been running for quite a while.

If someone could guide me, I would really appreciate it.

$ACT