This chart shows the total crypto market cap, excluding Bitcoin and Ethereum, on the 4-hour timeframe. The blue line represents a resistance level around the 680B mark. The current market cap is just below this level, around 632.5B.

If the market cap breaches the blue line, it could signal a breakout, potentially leading to a bullish move toward the next resistance zone marked by the red area (approximately 800B-840B). This zone could act as a significant resistance, but a breakthrough there would further confirm a strong uptrend.

In summary, the blue line is a critical level to watch. A breakout could signal a rapid increase in the market cap, potentially triggering an altcoin rally.