1. Different subjects: DMA is a trading method provided by participants such as brokers and private equity institutions to meet the needs of high-frequency trading. Brokerage's self-management refers to the trading system established by brokers themselves for their own trading operations.

2. Different risk strategies: DMA uses a variety of hedging tools to build a portfolio strategy to reduce system risk. High-frequency trading can be realized by executing trading quickly and using algorithms. Brokerage self-management will spread risks through income swap contracts and set up long-term and short-term accounts for customers in the self-management system.

3. Different operation modes: DMA can directly connect to the market by directly connecting to the trading interface of the exchange, and the trading speed is faster. Broker self-management is trading through the trading system built by brokers, which is slower than DMA.