Data source differences?


Experienced member
1,071 3
? Beats me, but is sure is frustrating sometimes. Manual error? One thing I have found though is that the most expensive data feeds are not the most accurate.


Well-known member
340 0

Sometimes vendors include pre and post market trading in their figures. Some other vendors will show the highest bid/offer rather than highest trade price.

Some vendors just pick the last trade price for the close but this is often incorrect if there is after hours trading or the close is set by an auction process as happens in a lot of the European markets. Same thing can happen at the open if there is an auction.

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