The 'What If' allows you to see what your profit and loss would be prior to placing a bet on the Ladder screen. Once enabled when you hover your mouse cursor over any of the back/lay prices (as if you were going to place a bet) the software will display the predicted profit/loss if the bet was matched at this price (using your current stake and staking method).
This can be very handy if your opening up multiple positions and want to see how an additional bet will influence and change the profit/loss on your existing bet(s) - you may then want to adjust your stake or even staking method prior to placing the bet.
In the image below I have a £100 stake selected for the 3rd fav and have my cursor pointing to place a back bet at the price of 7.4, you can see in the 'What If' area above each ladder it showing I would win £640 if my selection wins and I will lose £100 if any of the other selections win.
Skip forward a few minutes and I now want to offer a lay bet on the 2nd fav at the best reverse price (7.2), for £25, as I point the cursor over this cell the 'What If' figures have now updated to show the new predicted P/L on each selection if this 2nd bet were to be placed and matched at 7.2
To display the What If Projected Profit & Loss, select 'Profit Values' from the 'Information Type' pick list in the Additional Information tab. Then from the 'Profit Value' pick list that will appear select 'What If? - Projected Profit & Loss'
For details on enabling and seeing the 'What If' profit/loss on the One-Click and Manual Bets screens please see the following page.