# Empty historical bar data due to ticker change

**URL:** <https://forum.alpaca.markets/t/empty-historical-bar-data-due-to-ticker-change/7341>\
**Category:** Alpaca Market Data\
**Created:** [November 8, 2021, 1:47am UTC](https://forum.alpaca.markets/t/empty-historical-bar-data-due-to-ticker-change/7341 "2021-11-08T01:47:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ai\_trader](https://avatars.discourse-cdn.com/v4/letter/a/ebca7d/32.png) [@ai\_trader](https://forum.alpaca.markets/u/ai_trader)\
**Post date:** [November 8, 2021, 1:47am UTC](https://forum.alpaca.markets/t/empty-historical-bar-data-due-to-ticker-change/7341/1 "2021-11-08T01:47:19Z")

</div>

Data pro v2 (paid subscription) seems to miss the historical bar data for certain tickers due to ticker change, even if the ticker change happened weeks ago.

For example, ticker WOLF returns empty historical 1-minute bar data, which was changed from CREE.