Hot answers tagged time
I think storing in UTC format is good practice. Here couple ideas that may motivate someone to deviate from that: Some markets are subject to day light saving time shifts and thus it introduces additional computations to convert back and forth, having to keep track of the 2 times a year the shifts occur. Some only limit themselves to an individual market, ...
Interactive Brokers provides it as a field called count. In this page of the IB API Reference Guide count is described as follows When TRADES historical data is returned, represents the number of trades that occurred during the time period the bar covers.
Its not available for free anywhere that I know of. Your only option is to purchase tick data for the instruments you're interested in and then count the ticks per trading session (or whichever timeframe you want to use). EDIT: This link might be interesting for you regarding how to get market data. ...
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