Hi,
I've played with the dutching files available, read through all the posts I can find, and also created my own files to see if I can create a tennis dutching automation that uses a margin maker percentage.
The closest I've come to success is adapting one of Dallas's horse racing files to match two players and then adjusting the back-bet parameters to "closest % above best market price" on one of the runners when both are based on book price.
Unfortunately this only then sets a % based bet for the current runner's market price, not the whole book which is where the margin maker % is calculated.
So, effectively, what I'm trying to achieve is:
Bet 1 at best market price for the fave.
Bet 2 at margin maker % increase based on the combined price of both runners.
The danger of just basing it on one runner is that your liability increases as tick size increases and makes losses unmanageable.
Has anyone managed to achieve this? If so could you point me in the right direction so I can hack it together?
Many thanks.
For ref Dallas's file was on this page.
viewtopic.php?f=52&t=11265
Dutching a tennis market with a margin maker
Sadly, you are searching for the impossible.
There is no combination of stakes can be made in a market of just two selections that will leave you with a win on one selection but no loss - or even a reduced loss on the other that would be better than a straight back or lay bet on one or the other - unless you:
happen upon a market that is either underound on the backside or overound on the layside (which rarely happens in a two selection market)
or
you have taken an initial postion one one selection and trade all or some of it when the market moves in your favour.
Dutching, however do it, is only spreading out the upside across the runners you select to back - but it cannot remove the downside on the ones you don't select - and you always have to have at least one of those.
There is no combination of stakes can be made in a market of just two selections that will leave you with a win on one selection but no loss - or even a reduced loss on the other that would be better than a straight back or lay bet on one or the other - unless you:
happen upon a market that is either underound on the backside or overound on the layside (which rarely happens in a two selection market)
or
you have taken an initial postion one one selection and trade all or some of it when the market moves in your favour.
Dutching, however do it, is only spreading out the upside across the runners you select to back - but it cannot remove the downside on the ones you don't select - and you always have to have at least one of those.