I've been pulling trade, quote and aggregated level 2 data out of MBTrading for a few months, and notice that the time reported for trade and quote events is somewhere between 9 and 15 seconds after the fact. Is this normal? I realize that some of this will be my own internet connection and the networking between me and the source of the data. Let's assume for the moment that my connection and networking here is average for the sake of argument. Anyone with other data providers experience anything similar? Better? I've been thinking of switching over to IB - anyone using them as a data stream source, and if so have you measured their latency? I'm trying to find the lowest-latency data provider without jumping into a hosted solution near the actual exchange... What's the best I can expect? Bottom line: if I see something that triggers a buy or sell order, what is a reasonable expectation of elapsed time between the REAL event I am reacting to and when my order is seen by the exchange? Thanks in advance, Scott