Lock/guarantee cash in API

[Nordick]

Hi there!

In web interface a bettor has "lock/guarantee cash" function, that allows to withdraw a matched deal based on the current market situation.

Is such function available in API?

Thanks!

[Strappa71]

If you can do math it has always been and will always be available!

[Nordick]

If you can do math it has always been and will always be available!

Ok, I see. I just wanted a magic button

[Ztown]

hi

what is the math?

[AlgoTrader]

The math iss very basic

for two selectionId's markets

p1Balance + p1Sum*(p1Price-1) = p2Balance-p1Sum;

for three selectionId's markets

p1Balance + p1Sum*(p1Price-1)-p2Sum = p2Balance - p1Sum + p2Sum*(p2Price-1) = p3Balance - p1Sum - p2Sum

For two outcomes, you need just one bet to fix profit or loss, for three outcomes you may need two bets. For N selectionIds there may be need of N-1 bets. There are lots of special cases when several selectionIds has equal current balance, then the number of bets is reduced.

[Ztown]

I implemented the cash out feature using matrix algebra for cases where n>3. If anyone is having problems with the matrix algebra, please ask me.

[AlgoTrader]

The problem is not algebra. The problem is when several bets are needed to "cache out", then price change may cause some of the bets to be matched and some stay open. The only reliable cache out is when betting was done on a single selectionId.

[Ztown]

The original poster just wanted a replication of the "cash out" feature of betfair. Betfair doesn't
guarantee you get filled. What you are talking about is order/position management.