Weekly fuel price oscillation in Helsinki area in Finland [OC] Visualization

What This Visualization Shows

This data visualization displays "Weekly fuel price oscillation in Helsinki area in Finland [OC]" and provides a clear visual representation of the underlying data patterns and trends. The visualization focuses on I visualized the recent fluctuation of 95E10 petrol prices across various gas stations in the Helsinki metropolitan area. The plot shows data from late 2025 (Week 48 - Week 52). The local newspaper *Helsingin Sanomat* has discussed this price oscillation phenomenon in the Helsinki region, which has been observed for years. There is no clear explanation for this phenomenon, where prices often jump up simultaneously across stations on Tuesday or Wednesday and then slowly drift downwards over the subsequent days. You can read more about it here (in Finnish): [https://www.hs.fi/pkseutu/art-2000008244136.html](https://www.hs.fi/pkseutu/art-2000008244136.html)

**Visualization Details:**

* **Black dots:** Individual price reports from varying stations. * **Line:** 1-day moving average determining the general price trend. * **Y-axis:** Price in €/liter.

**Sources:**

* **Data Source:** [polttoaine.net](http://polttoaine.net) (crowdsourced fuel prices in Finland), collected via Home Assistant.

**Tools Used:**

* Python (Matplotlib, Pandas) * Home Assistant (data history collected daily from polttoaine.net with HA script), which allows us to understand complex relationships and insights within the data through visual storytelling.

Deep Dive into the Topic

This data visualization represents a sophisticated analysis of complex information patterns that provide valuable insights into underlying trends and relationships. Data visualization serves as a bridge between raw numerical data and human understanding, transforming abstract statistics into comprehensible visual narratives.

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Data Analysis and Insights

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Significance and Applications

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