OCO Script [Order Cancels Order]

Hi, traders! I need your help again!

I need an advice where I can find an OCO script or expert which stands for order cancels order. I found one which is called OCO Visual, but it doesn't work. The icon under experts appears to be Grey, not like the others.

Basically, it set up two trades. When the one is filled, the other will be canceled.

Can you give explanations why? Or the script you are using for that? Or any extra help?
How to install it properly?

Waiting for your helpful results.

gee bhai jb hm apne trading mein order laga dete hein to hm hm cancel nhe kr skte hien aur hmein apne trading mein jb order profit mein ata he phr close krna hota he aur hmein apne trading mein jo pending order ya jo hm ne advance book kie hote hien un ko to hm cancel kr skte hien