At present, there are two main documentary modes in the market, one is non-identical documentary mode, and the other is identical documentary mode. Non-Taiwan Documentary: Non-Taiwan Documentary, these platforms are independent. The general documentary platform cooperates with many brokers and can dock with many brokers. The specific account opening and fund security are the responsibility of various brokers, such as Zulutrade, Mql, Followme, cMirror, SIRIX, myfxbook, etc. Documentary on the same platform: The documentary platform on the same platform itself is a broker, making a social documentary system by itself. For example, etoro, darwinex, ayondo, Tiger Finance, Financial Circle, etc. , mainly depends on the strength of each broker: supervision, technology, financial strength, reputation and so on. Compared with non-physical exhibition, it has the advantage of operating on the same platform. All orders directly copy the trading signal of the main account through the server or VPS, and all orders are completed in a short time, which reduces the time in the process of signal transmission and the delay will be lower than that of non-physical exhibition. The interaction protocol between different documentary brokers is transparent to signal providers and subscribers, and the accounts of both parties can belong to completely different brokers. But some documentary signals are the third and fourth signals, and there will be documentary delay.