No it is not. You can put stop-loss (or take profit) even before you have anything (limit order). It's just about conditioning:
condition 1: enter position if price reaches X
condition 2: if position entered, exit position if price reaches Y (YX).
It's actually quite simple and I don't understand why exchanges don't have that option. Because mostly they don't.
I believe that it's simply because their costumers are not asking for it in a big enough number that the management board actually see it as a priority and implements it. It would need to stop their operations for some time and increase their expenses when implementing and then debugging if it fails since it's a new implementation. In the case of Exchanges that are already functioning of course.
Some want to offer the best service they can and constantly seek for improvements to implement but sadly not everybody thinks like that, it would be interesting. The simple fact of having conversations about it in the forum could create more awareness about it between decision-makers in Exchanges.