# Historical Bar Data returns None

**URL:** <https://forum.alpaca.markets/t/historical-bar-data-returns-none/8954>\
**Category:** Alpaca Market Data\
**Created:** [March 26, 2022, 7:37pm UTC](https://forum.alpaca.markets/t/historical-bar-data-returns-none/8954 "2022-03-26T19:37:14Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![superjq](https://avatars.discourse-cdn.com/v4/letter/s/3da27b/32.png) [@superjq](https://forum.alpaca.markets/u/superjq)\
**Post date:** [March 26, 2022, 7:37pm UTC](https://forum.alpaca.markets/t/historical-bar-data-returns-none/8954/1 "2022-03-26T19:37:14Z")

</div>

I switched to using V2 of the market data API and am trying to get the latest 100 Minute bars for a list of symbols. It worked yesterday no problem, but when I ran the same code today, I get the following response.

```auto
{'bars': None, 'symbol': 'WM', 'next_page_token': None}

```

Here is my code:

```auto
url = 'https://data.alpaca.markets/v2/stocks/{}/bars?&limit={}&timeframe={}'.format(symbol, limit, timeframe)
response = requests.get(url, headers=config.HEADERS).json()

```

Any help is greatly appreciated.

---

<div class="post-metadata">

**Author:** ![oleg.rakhmatulin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/oleg.rakhmatulin/32/559_2.png) [@oleg.rakhmatulin](https://forum.alpaca.markets/u/oleg.rakhmatulin)\
**Post date:** [March 27, 2022, 8:31am UTC](https://forum.alpaca.markets/t/historical-bar-data-returns-none/8954/2 "2022-03-27T08:31:00Z")

</div>

According to [documentation](https://alpaca.markets/docs/api-references/market-data-api/stock-pricing-data/historical/#bars) both `start` and `end` query parameters are mandatory.