Data values are different for 'tick' and 'minute' time-series requests
>>> dataFrame = ek.get_timeseries(rics=["AMXL.MX"], start_date="2018-12-11 21:00:00", end_date="2018-12-11 21:10:00", interval="tick", normalize=False) >>> dataFrame AMXL.MX VALUE VOLUME Date 2018-12-11 21:00:01.096 NaN 326400.0 2018-12-11 21:00:01.096 NaN 193800.0 2018-12-11 21:00:01.096 NaN 413800.0 2018-12-11 21:00:01.096 NaN 600.0 2018-12-11 21:00:01.096 NaN 934000.0 2018-12-11 21:00:01.096 NaN 65400.0 2018-12-11 21:00:01.096 NaN 855100.0 2018-12-11 21:00:01.096 NaN 855000.0 2018-12-11 21:00:01.096 NaN 100.0 2018-12-11 21:00:01.096 NaN 855000.0 2018-12-11 21:00:01.096 NaN 100500.0 2018-12-11 21:00:01.096 NaN 248144.0 2018-12-11 21:00:01.096 NaN 84700.0 2018-12-11 21:00:01.096 NaN 625356.0 2018-12-11 21:00:01.096 NaN 1054644.0 >>> dataFrame = ek.get_timeseries(rics=["AMXL.MX"], start_date="2018-12-11 21:00:00", end_date="2018-12-11 21:10:00", interval="minute", normalize=False) >>> dataFrame AMXL.MX HIGH LOW OPEN CLOSE COUNT VOLUME Date 2018-12-11 21:00:00 13.85 13.81 13.83 13.82 83.0 299274.0 >>>
The sum of Volume field values for 'tick' request is 6612544. But in 'minute' it's 299274.
Shouldn't they be the same?
No, they shouldn't. The one minute interval timestamped at 21:00:00 is the minute that ends at 21:00:00, i.e. the 60 seconds between 20:59:00 and 21:00:00. The tick data in your example falls into the next one minute interval: the one that ends and is timestamped at 21:01:00. That latter one minute interval is not returned when you ask for 1 minute timeseries because it falls outside of the trading session. I'm not sure what the volume after 9pm GMT refers to. There's no price associated with it. Perhaps it's related to a closing auction? I'm afraid I'm not an expert on the trading rules for Bolsa Mexicana. If you need to find out how to interpret this data the best resource is Refinitiv Helpdesk.
I checked the ticks between 20:59:00 and 21:00:00.. The sum of Volume also does not match to 'minute' volume.
I just did the same and the sum of the volume for all ticks between 20:59:00 and 21:00:00 came to 299274, the same as the volume for 1 minute interval timestamped 21:00:00.
We contacted that exchange with the question how to collect Closing Auction volume. So they told us that all trades between 21:00:00 and 21:05:00 (I don't remember exact time). So we collect all the ticks and calculate the summary. So I decided to check what if I collect 'minute' intervals for that period. It will return less rows with the same result.. I thought. So why is the data not available with minutes/hours intervals? Refinitiv Helpdesk?
Yes, if you need an explanation how the closing auction volume is represented in the timeseries and why it is not shown in 1 minute summarization, the best resource is Refinitiv Helpdesk.