user2116: i noticed that from the 13th of feb 2015 the bitcoin price becomes a lot more "noisy" on bitcoinaverage.com:

does anybody know whether this is actually due to bitcoin price movements becoming more rapid, or whether its just that bitcoinaverage.com increased their sampling frequency?

user2306: I don't think the issue is that they don't have the data. I think they're just showing the data at a lower sampling rate.
This chart draws data from three locations:

https://api.bitcoinaverage.com/history/USD/per_minute_24h_sliding_window.csv
Updates once per minute, but only has 24 hours of data.
https://api.bitcoinaverage.com/history/USD/per_hour_monthly_sliding_window.csv
Updates once per hour, but only has a month of data.
https://api.bitcoinaverage.com/history/USD/per_day_all_time_history.csv
Updates once per day, but has all data.

Note how the data that goes back further is less precise.

2116: <p>i noticed that from the 13th of feb 2015 the bitcoin price becomes a lot more "noisy" on <a href="https://bitcoinaverage.com/charts#USD-averages-false" rel="nofollow noreferrer">bitcoinaverage.com</a>:</p>

<p><img src="https://i.stack.imgur.com/atv4L.png" alt="price noise"></p>

<p>does anybody know whether this is actually due to bitcoin price movements becoming more rapid, or whether its just that bitcoinaverage.com increased their sampling frequency?</p>
 2306: <p>I don't think the issue is that they don't have the data. I think they're just showing the data at a lower sampling rate.</p>

<p>This chart draws data from three locations:</p>

<ul>
<li><p><a href="https://api.bitcoinaverage.com/history/USD/per_minute_24h_sliding_window.csv" rel="nofollow">https://api.bitcoinaverage.com/history/USD/per_minute_24h_sliding_window.csv</a><br>
Updates once per minute, but only has 24 hours of data.</p></li>
<li><p><a href="https://api.bitcoinaverage.com/history/USD/per_hour_monthly_sliding_window.csv" rel="nofollow">https://api.bitcoinaverage.com/history/USD/per_hour_monthly_sliding_window.csv</a><br>
Updates once per hour, but only has a month of data.</p></li>
<li><p><a href="https://api.bitcoinaverage.com/history/USD/per_day_all_time_history.csv" rel="nofollow">https://api.bitcoinaverage.com/history/USD/per_day_all_time_history.csv</a><br>
Updates once per day, but has all data.</p></li>
</ul>

<p>Note how the data that goes back further is less precise.</p>
