Question about Market Version

[geoffw123]

Hi

Here is a scenario that has cost me real money on more than one occasion.

I place a few orders on the correct score market of a footy match. Not concentrating too much I don't notice that a bet of say 0-1 has not got matched and remains in the market. Then of course the home team scores before I notice it and then my 0-1 Back bet gets gobbled up by one of the bots.

So I was very pleased to see the recent API update that allows the optional marketVersion number to be specified in PlaceBet().

Doc states,

This ‘version’ is incremented when significant events – runner removal, turn in-play etc. – occur

I naturally assumed a goal being scored in the correct score market would increment the MarketVersion number as its the ideal use case for this new feature.

When I came to test the code I added, I discovered it didn't work due to the simple reason Betfair don't seem to incremement this number when a goal goes in ?

Can Betfair Dev's confirm or correct my statement here please ?

If I am correct, please explain why you don't increment this number when a goal is scored. It makes no sense not to.

Geoff

[BetfairDeveloperProgram]

Hi Geoff,

If a bet is placed before a goal is scored and the market is suspended (which is the case for managed Correct Score markets), any bet sent with a version number should be rejected if received immediately after the market suspension due to the change in the version number.

The documentation page has more information via http://docs.developer.betfair.com/do...rsionparameter

Please raise a request with support via https://developer.betfair.com/support/ if you think you have an example that demonstrates that this didn't work as expected.

Thanks

Neil

[jabe]

The first link doesn't work.

[BetfairDeveloperProgram]

Hi Jabe

Thanks for pointing this out, this has now been corrected.

Neil

[jabe]

Hi Jabe

Thanks for pointing this out, this has now been corrected.

Neil

Thank you.

[betdynamics]

Geoff

I was under the impression that the way it worked was as follows:

When you place a bet with a marketVersion specified, then the bet is rejected if the marketVersion has changed when Betfair processes the bet (i.e. when they attempt to place it into the Exchange)

However, it does NOT cancel the bet if the marketVersion changes AFTER the bet has been placed onto the Exchange.

In other words, it only applies to the bet placement operation.

In your case, I think you are expecting the bet to be cancelled as the marketVersion has changed after the bet placement.

Perhaps Neil could confirm the interpretation.

[geoffw123]

Hi Neil

Thanks for the reply, when I was trying to figure out what was going on with my code I put a typo into my debug code which meant I jumped to the wrong conclusion as to why the bet wasn't dropped.

I have tested it properly now, the market version number sent by BF is changing as expected on a correct score market.

For info, I will post some debug output as it is a bit more informative than the raw docs. Interestingly a false alarm suspension gives slightly different behaviour to a suspension due to a goal.

Incident 1

1: 18:48:15 Status = OPEN isInPlay=true MarketVersion is 1461804199
2: 18:48:17 Status = OPEN isInPlay=true MarketVersion is 1461804199
3: 18:48:19 Status = OPEN isInPlay=true MarketVersion is 1461804199
4: 18:48:21 Status = OPEN isInPlay=true MarketVersion is 1461804199
5: 18:48:23 Status = OPEN isInPlay=true MarketVersion is 1461804199
6: 18:48:25 Status = SUSPENDED isInPlay=true MarketVersion is 1461805106
7: 18:48:27 Status = SUSPENDED isInPlay=true MarketVersion is 1461805106
8: 18:48:29 Status = SUSPENDED isInPlay=true MarketVersion is 1461805106
!! Goal Scored !!
9: 18:48:31 Status = OPEN isInPlay=true MarketVersion is 1461805910
10: 18:48:33 Status = OPEN isInPlay=true MarketVersion is 1461805910
11: 18:48:35 Status = OPEN isInPlay=true MarketVersion is 1461805910

Incident 2

406: 19:01:47 Status = OPEN isInPlay=true MarketVersion is 1461805910
407: 19:01:49 Status = OPEN isInPlay=true MarketVersion is 1461805910
408: 19:01:51 Status = OPEN isInPlay=true MarketVersion is 1461805910
409: 19:01:53 Status = OPEN isInPlay=true MarketVersion is 1461805910
410: 19:01:55 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
411: 19:01:57 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
412: 19:01:59 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
413: 19:02:01 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
414: 19:02:03 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
415: 19:02:05 Status = SUSPENDED isInPlay=true MarketVersion is 1461836134
!! False Alarm no goal scored !!
416: 19:02:07 Status = OPEN isInPlay=true MarketVersion is 1461836734
417: 19:02:09 Status = OPEN isInPlay=true MarketVersion is 1461836734
418: 19:02:11 Status = OPEN isInPlay=true MarketVersion is 1461836734
419: 19:02:13 Status = OPEN isInPlay=true MarketVersion is 1461836734
420: 19:02:16 Status = OPEN isInPlay=true MarketVersion is 1461836734
421: 19:02:18 Status = OPEN isInPlay=true MarketVersion is 1461836734
422: 19:02:20 Status = OPEN isInPlay=true MarketVersion is 1461836734

[geoffw123]

Hi BetDynanics

Thanks for the insightful post, you have put your finger on where the confusion has arisen. The exact wording from the docs is

This functionality should be of use to those who want to bet right up to the actual ‘off’ of a horse race or sporting event but be confident that you’re not inadvertently bet into the first seconds of in-play after the off. Similarly, in managed football markets, you can avoid your bets reaching the Exchange after the market has reformed following a goal being scored etc.

Now I have read it through again I think I agree with your interpretation. If a bet has been sitting as unmatched for 10 minutes with a sent marketVersion=X and then a goal is scored and reforms with marketVersion=Y. That bet will not be cancelled.

This makes it a pretty uninteresting feature for me now as it doesn't solve the scenario I described in the first post. Oh well guess I need to pay more attention so the bots don't gobble up my dumb orders.

It would be good if Neil could just confirm Betdynamics conclusions as its a bit of a subtle point. Thanks

Geoff