What is Block DX? Block DX is the fastest, most secure, most reliable, and most decentralized exchange (DEX), built on the Blocknet Protocol. Block DX is non-custodial, offers decentralized order books, order matching, and settlement (atomic swaps), and allows users to trade native digital assets instead of derivatives (proxy tokens or colored coins). Trades are near-instant, taking only 5-20 seconds for completion regardless of the block time of the asset being traded.