Polkadot is a type of digital money that can be bought and sold. Its value went down by 4.9% in one day, which means people were selling it less and less. This happened after the value of Polkadot already went down by 15% in a week. The chart shows how much Polkadot's value changed over different time periods. The wider the gray bands around the lines, the more the value moved up and down. Less people were buying and selling Polkadot recently, but there are still many coins available. Read from source...

- The title is misleading and sensationalized. It does not reflect the actual percentage of decrease (4.9%) but rather exaggerates it to 4%. This creates a false impression of a more significant drop than reality.
- The article lacks any clear context or background information on Polkadot, its purpose, features, advantages, and challenges. It assumes the reader already knows about Polkadot and does not provide any introduction or explanation for those who are unfamiliar with it.
- The article uses technical terms like Bollinger Bands, volatility, trading volume, circulating supply without defining them or explaining how they relate to Polkadot's performance. It expects the reader to have prior knowledge of these concepts and does not provide any educational value or insight.
- The article compares the price movement over the past week but does not mention the longer term trend, such as monthly, quarterly, or yearly performance. This gives a narrow and potentially misleading perspective on Polkadot's stability and growth potential.
- The article ends abruptly with an incomplete sentence, suggesting a lack of attention to detail and professionalism.