Hi,
@Lizziew24 it all depends on your bet and which calculator mode you are using, plus there are different calculators for different bets on various MB'ing sites, so it can be confusing (especially if you have a 'bird brain' like me, ha ha!).
If you get a red figure this will be for a 'qualifying bet' such as 'bet £5 to get a £10 free bet. The red amount is your 'qualifying loss (QL).
In other words you will lose the red amount IN TOTAL, but you will then get a £10 Free Bet to use.
When you place the £10 Free Bet you will calculate it as a SNR and the calculator will show the green amount IN TOTAL that you will get, regardless of whether the bet wins at the Bookie or the Exchange.
Hope you hear back from Appen too, good luck