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What is the best way to describe latency?

What are good ways of describe observed tick data latency with a view to flagging when something is systematically wrong? For example, we would want to discount outlier ticks so that we do not alert ...
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Should I analyze the tick data day by day?

Let assume that we have one month of tick data which were traded at NYSE. We want to model the price changes as a function of the last p lags of price changes and the last q lags of the time duration ...
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232 views

Simple EOD computations for tick data

As part of End-Of-Day calculations once a particular market/exchange has closed for all the tickers traded on that market one may typically compute the following properties: OHLC Bid/Ask Price ...