Cymatic Trader Community

[Snowflame]

Hi Gavin,

Can you please help me understand why this race reduced my ( demo) balance from £816 to £697? It is my understanding that I should have made a small profit.

Please see the attached file.

Thank you...

[Gavin]

Hi Snowflame,

To realise the profit in your demo balance you must cancel all the unmatched bets and green up the entire market before it closes. The demo market never finds out which horse won, so it assumes your worst possible outcome. If you green up then it overcomes that.

It is calculated in the same way Betfair:

First, sum the liability of all the matched bets:
So for your matched lay bets :
= total stakes x (odds -1)
= £20.15 x (2.8 -1)
= £36.27

The, sum the liability of all the unmatched bets.
So for your unmatched lay bets :
= total stakes x (odds -1)
= 45.92 x (2.8 -1)
= £82.66

Add the two together:
= £36.27 + £82.66
= £118.93 total potential liability, which also corresponds to the reduction in your demo balance.

That may not be the best way to calculate maximum exposure but it is how Betfair do it.

Kind regards,

Gavin

[Snowflame]

Hi Gavin,

Thank for the reply. Yes, I knew how Betfair calculates liability/profit etc, that is why I raised the issue. I was placing bets using the laythefield excel file on autopilot. When there are races starting as soon as another race finishes I don't have time to green up or cancel unmatched bets. This means I would need to be at the PC even on autopilot. Is there a way of doing this automatically?

[Gavin]

Hi Snowflame,

OK thanks, I understand what you mean. Unfortunately I can't think of a way to automate avoiding that limitation of demo mode, when using that particular spreadsheet.

Kind regards,

Gavin