Can someone explain .......

[thunderfoot]

I've recorded a fair bit of BF data at 1 second intervals.

When I graph the 'Total Amount Matched' (Col. P) for specific selections I can see when there looks to be bots firing-in large sums, as the graph line suddenly jumps up.
For instance I have one, of many cases, where I can see a significant jump of £2,000 in the 'Total Amount Matched' in 4 seconds. The 'Last Price Matched' is showing odds of 4.3 for those 4 seconds and the LAY odds shows :-
1. 4.3 - £39
2. 4.3 - £18
3. 4.3 - £32
4. 4.3 - £4

..... all in 'first' position (Col. H).

The question is, if £2,000 is showing as being MATCHED in Col. P at odds of 4.3, why isn't the £2,000 being shown in Col. H against the odds of 4.3?

Think that makes sense!!

[Captain Sensible]

Remember £2k matched total is only £1K in real cash, I assume when you mention column H you mean column I showing the available cash to lay ? In real time alot can happen in that 1 second it's possible any transactions could have taken place mid second or may even have been matched as a back at 4.2, you'd need to be polling the full traded volumes to see where it was actually matched. Depending on the market your recording it could also have been taken on the other outcomes by betfairs bet matching software

[thunderfoot]

Remember £2k matched total is only £1K in real cash

Ah, yes!!

I assume when you mention column H you mean column I showing the available cash to lay?

I do.

In real time alot can happen in that 1 second it's possible any transactions could have taken place mid second or may even have been matched as a back at 4.2, you'd need to be polling the full traded volumes to see where it was actually matched. Depending on the market your recording it could also have been taken on the other outcomes by betfairs bet matching software

The Market was the Greyhounds, so not a massive amount of liquidity, but still would have thought some of that £1,000 would have been seen, in Col. I, during the 4 second period.

[Ian]

Which day was this ? If it was Friday then there was something strange going on with the greyhound markets. A friend rang me up about it but until I reduced the refresh to 0.2 sec I couldn't see what was going on. Big lay bets were appearing on the LH side and disappearing - you didn't see them at 1 sec refreshes.

[thunderfoot]

Which day was this ? If it was Friday then there was something strange going on with the greyhound markets. A friend rang me up about it but until I reduced the refresh to 0.2 sec I couldn't see what was going on. Big lay bets were appearing on the LH side and disappearing - you didn't see them at 1 sec refreshes.

Yep, Friday 4th December. Will see if the same thing is happening over the next day or so.