user57060: It seems that Poloniex takes up to 2-3 minutes (with quite a lot of variance) to compile the OHLC data (API method returnChartData) of a period that just ended. I've experimented with 30 minutes periods, so 2-3 minutes is up to 10% of a period, which is a lot! 
Could it be that I'm doing something wrong? I'm using this python-poloniex wrapper, and I'm after the OHLC prices of a few BTC pairs.

user81714: No, you are not doing nothing wrong. It's internal issue of Poloniex.
Every day I see that most of cryptocurrencies have missed candlesticks. And after up to 40 min are updated.
Even on charts you can see that

57060: <p>It seems that Poloniex takes up to 2-3 minutes (with quite a lot of variance) to compile the OHLC data (API method <code>returnChartData</code>) of a period that just ended. I've experimented with 30 minutes periods, so 2-3 minutes is up to 10% of a period, which is a lot! </p>

<p>Could it be that I'm doing something wrong? I'm using this <a href="https://github.com/s4w3d0ff/python-poloniex" rel="nofollow noreferrer">python-poloniex wrapper</a>, and I'm after the OHLC prices of a few BTC pairs.</p>
 81714: <p>No, you are not doing nothing wrong. It's internal issue of Poloniex.
Every day I see that most of cryptocurrencies have missed candlesticks. And after up to 40 min are updated.
Even on charts you can see that</p>
