Well spotted.
Your right, my mistake.
Should read.

BTP
10.00 divided x 20.00 = O/L .50
Risk 9.50

BTO
10.00 divided x 19/1 = O/L .52
Risk 10.00

The point here is that there is very little difference between processes.

The big difference is when very short prices are backed to fall over, is the main point I was trying to allude to and it would take the larger prices a lot longer to pull the losses in.

There is a manual application called BetTrader Evolution
(**** Bet Trader Pro) that has this betting to price program .
They call it the Bookie Bet (Betting to price)

__________________
Cheers.