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A comment on The High-Speed Trading Behind an Amazon Purchase. Parent comment

Re:The High-Speed Trading Behind an Amazon Purchase by easychris on Monday March 27, 2017 @05:29AM (#13966202)
We have a grocery store in Krefeld, Germany, which uses e-ink price tags exclusively[1]. But I never noticed a real-time change when I was shopping there.

[1] http://www.lebensmittelzeitung.net/storechecks/Neues-Real-Ko... (e.g. pics 9, 20-24).

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