This feels like a necessary step to making the exchange a professional trading tool. Since everyone is competing in a debt pool I believe it’s the only responsible choice to give users the option to set targets and better manage their trading.
I would love to see something like this and it was promised a long time ago. I think the problem here are the difficulties to implement something like this with the technical tools given by the EVM. There is simply no concept like event based transactions. So it will be complicated to trigger the user defined stops.
I found the following resource which describes a reward based concept which allows users to get a reward by triggering constraint based events on chain. Maybe this could be something to look into.