Futures execution question

K

Klamath

I don't have much experience trading futures. Today at 8:39:02 central my ATS placed a buy limit order on the ES at 751.75 through IB. At 8:39:08 my IB datafeed showed the bid-ask as 751.5 to 751.75. Since the ask was at my limit order to buy around 6 seconds after the order was placed, shouldn't I have been filled?
 
Quote from Klamath:

I don't have much experience trading futures. Today at 8:39:02 central my ATS placed a buy limit order on the ES at 751.75 through IB. At 8:39:08 my IB datafeed showed the bid-ask as 751.5 to 751.75. Since the ask was at my limit order to buy around 6 seconds after the order was placed, shouldn't I have been filled?
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I'm not an expert either but it seems that if, for example, there were 10 bids on the books at 751.75, but only 5 offers to sell at 751.75, then only 5 bids would get filled. I suppose those bids that had been there the longest, would get filled first.....don't know for sure. Maybe someone will elucidate... Stosh
 
Quote from Klamath:

I don't have much experience trading futures. Today at 8:39:02 central my ATS placed a buy limit order on the ES at 751.75 through IB. At 8:39:08 my IB datafeed showed the bid-ask as 751.5 to 751.75. Since the ask was at my limit order to buy around 6 seconds after the order was placed, shouldn't I have been filled?
More...

There was a plus tick bid a second later, so looks like IB/your ATS was slow and you parked your order on bid. Check the execution report when exactly you got accept on the order.

Code: 
...
09:39:03  751.50 x 751.75  510 x 79   
09:39:03  751.75 x 752.00  32 x 706   
09:39:03  79s751.75 
...
09:39:09  751.75 x 752.00  187 x 282   
09:39:09  751.50 x 751.75  685 x 1   
09:39:09  187s751.75                      <- here was your fill
 
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