Where are the SL orders actually placed

hi,

Where are the SL orders actually placed ?

At exchange level or broker terminal level ?

Many times have seen brokers cancelling all pending orders due to some techinal issue and we have to place the same.

If SL orders are at exchange level , then why does it get cancelled?

TIA,

suhashede

They are placed at exchange level but brokers do have the medium to cancel it because it’s their software we are placing them. The orders go through them.