Instructions
The trading window shows in real-time - already when entering invested Credits - the potential winnings if you execute this transaction. Doing so, please always consider the new price of the answer option which is shown in the next column.
Once you are satisfied with the indicated values, close the transaction by pressing the green "Execute" button.
Mechanics
When investing Credits "in favour" of an answer (you go "Long") and such answer actually does occur in the end (during final settlement), the potential winnings will be credited to your trading account, if another answer occurs, the originally invested Credits will be lost.
Vice versa, if you invest Credits "against" an answer (you go "Short"), you win the potential winnings if another answer occurs in the end. Accordingly you lose the invested Credits, if the answer actually does occur.