Posted in Suggestions by igric
There are different colors used for LAY and BACK stakes (column chart with volumes). I noticed that the LAY stake that moves the BACK price up shows as a BACK one, i.e. blue color. I think it's not correct.
Also it would be desirable to have possibility to save monitoring market data in to some kind of log for future analysis.
Bfexplorer.net is official betfair software vendor offering its own betting or trading platform and development of bespoke solutions.
Betfair is registered trademark of The Sporting Exchange Limited.
Betfair
is the world's largest Internet betting exchange allowing punters back or lay
betting. "Back" something to happen or "lay" something not to
happen.
Thursday, January 15, 2009
Yes, I noticed this issue too, mainly when price rapidly changes. It is caused by the way how it is implemented, the betfair does not offer such data only last matched volume, so what was matched and by whom, if by back-er or lay-er is calculated from matched volume change and from currently offered odds so the matched odds fall either on the back or lay side.
I do not know if you read this article: New features for Bfexplorer?
In an effort of understanding market price influence factors I opened a new project: Market Analyzer which I use for testing a new backend and also in this issue. In the new backend I evaluate the last price matched slightly different way and it seems to show better results, I will fix this issue in the bfexplorer pro backend soon if my tests confirm it.
You are not allowed to save market data after the market is closed, If I wanted to offer such functionality I would have to ask betfair for historical data licence and of course pay for it as I pay for betfair api 200 GBP per month. Such functionality can be built just for personal use in bespoke solutions and I plan to add it into the Market Analyzer project which I maybe share with some of my pro subscribers.
Thursday, January 15, 2009
Thanks! Actually the Market analyzer is the thing I really need. Will it be accessible via PRO subscribtion or it'll be additional one. And when you think it'll be released?
Thursday, January 15, 2009
If I would put all effort to this project it could be finished in 7 days, I will see if I will release it for general use to PRO subscribers.
As I said I will definitely share it with some users as we share the rest of ideas about the automated trading or betting solutions. You are from Moscow and I already have one such user there for whom I built simple bot script according to his specification. He helps to test me some ideas as well.
Thursday, January 15, 2009
Ok. Thanks :)
Thursday, January 15, 2009
Another possible bug. It doubles the volume staked in the chart. The real one is 2 times smaller. I noteced it for my own bets but the same happend with other bets.
Thursday, January 15, 2009
No, this is not a bug. Do not forget that in matching process at betfair are included two parties: a backer and a layer, so the matched volume is 2 times bigger.
Friday, January 16, 2009
Friday, January 16, 2009
And your arguments are? Well, it is just one line of code and I am prone to fix it for charts, but betfair uses such methodology for presenting the matched volume.
Friday, January 16, 2009
Is Market Analyzer, which you are working on, based on login to betfair account or it scans betfair markets without logging to the account? Will be possible to monitor many markets and avoid BetfairData request chargest like in API apps?
Btw. now, I'm a bit confused by matched volume chart...so if I back 500 EUR on some team(and nothing else were matched), chart will display 1000 EUR blue bar, is that correct?
thanks
Friday, January 16, 2009
I do not use web page parsing/scrapping for betfair market data as having betfair api I do not need it. Such technique is used just for getting data from other web sites I use for betting/trading purposes.
Yes, as you could read already the betfair matched volume data shows volume of two times bigger than your matched back stake.