Both the "liability" and the "tick size" are problematic when auto trading and they can produce large imbalances if you are trading multiple horses.Bet Angel wrote:If you can come up with some staking formula's we can probably apply a model to put them in the software. Even if you have some basic parameters such as add, mult, divide by runner etc.
Chris is absolutely correct insofar that if you want a ladder green or red to reflect a standard and more or less even progression (eg £1,£2,£3 etc) for every selection that you are trading then the Stake has to be a function of the inter odds gap.
At 2.2 odds the stake needs to be 2.2/0.02 (=£110....odds divided by gap size). At odds of 3.6 the stake would be (3.6/0.05) ie £72.
The advantage in using this formula is that you are working on a standard base where the odds become unimportant and the win per tick value is consistent. Of course you can scale up to any tick green you wish eg £5 is simply 5 times Odds divided by tick size.
I attach ladder view as an example. Its the FA Cup Final where I have backed Arsenal for £184 at 1.84 (1.84/0.01), Liverpool for £68 at 3.4 (3.4/0.05) and Aston Villa for £46 at 9.2 (9.2/0.2).