According to DefiLlama data, on January 20th, the open interest on Perp DEX declined across all platforms in the past 24 hours due to the market downturn. Hyperliquid saw a decrease of approximately 9% compared to yesterday, but its trading volume remains at the top. The current trading volumes for some Perp DEXs are as follows: Hyperliquid: approximately $6.36 billion in 24-hour trading volume, $4.57 billion in TVL, and $8.77 billion in open interest; Aster: approximately $4.66 billion in 24-hour trading volume, $1.25 billion in TVL, and $2.61 billion in open interest; Lighter: approximately $3.36 billion in 24-hour trading volume, $1.07 billion in TVL, and $1.33 billion in open interest; EdgeX: approximately $2.82 billion in 24-hour trading volume, $427 million in TVL, and $1.16 billion in open interest; Paradex: approximately $2.72 billion in 24-hour trading volume, $226 million in TVL, and $641 million in open interest; Pacifica: approximately... $922 million, TVL approximately $46.54 million, and open interest $82.95 million.