Polkadot (DOT) has encountered significant resistance at the $4.50 mark, resulting in a near 1% decline during the current trading session. This downward movement is driven by sellers aiming to push the price below the 20-day Simple Moving Average (SMA). The market's reaction to this resistance level is crucial for determining DOT's short-term trajectory. Investors should monitor whether the 20-day SMA will act as a support level or if further declines are imminent. This development highlights the ongoing volatility and market dynamics within the blockchain and cryptocurrency sectors.