Type of order which currently only Kraken has as far as I noticed. and It was the only reason why I used their exchange back in the day ( now I hope to be here only / not trading CEX anymore anyway).
The idea goes like this ( You can check it there, I assume that they didn’t remove it).
I can place limit order for buy and limit sell order / stop loss at the same time.
Limit buy order for BTC at price 10,000$ for 10,000$. If the order executes I have 1 BTC at hand.
What Kraken Advanced order lets me Do is choose what I want to do with that 1 BTC and automatically opens another order.
for example stop loss at 9500 or maybe sell order at 11,000.