by GaryRussell » Tue May 24, 2011 5:53 pm
Normally BA will convert it to fractional odds before subtracting 50%, ie. it will calculate a 50% offset as ((10-1) X 0.50) + 1 = 5.50
If you are using the Beta version you can change this behaviour to calculate on decimal odds so it will calculate 10 X 0.50 = 5.00. Open preferences, select the general preferences tab and tick "Calculate tick % on decimal odds". It will then do what you want.