Hab mich mal getraut auf den Advanced-Link zu klicken. Kann mir aber noch nicht zusammenreimen was "Buy If Executed Price" bedeutet. Ist das das "Stop-Loss" von dem hier immer die Rede ist?

siehe:
https://de.bitstamp.net/article/new-trading-feature-added/Dear Bitstamp users,
We added a new feature to improve your trading experience. When placing a limit order you are now able to set a consecutive buy/sell order at a price at which you wish to buy/sell after the first order is filled.
Example:
- You can place a buy limit order for 1 BTC at a price of $500
- Corresponding with that order you have an option to place a sell order at $510
- When or if your buy order gets filled at $500, a sell order will be placed in the orderbook at $510
This feature is available for Limit Orders only. To use it, click on (Advanced) and fill the Buy/Sell If Executed Price field.
Thank you for using Bitstamp
Bitstamp team