Not reliable. Reverse documentary is a futures strategy, and making money is a big misunderstanding. The HSI reverse documentary is not necessarily reliable, and the most important factor for most people to consider in the reverse documentary trading model is income. Futures reverse documentary, also known as futures reverse, is a trading mode in which one or more loss-making investors' trading accounts are selected by computer software, and the target accounts are continuously traded in reverse, that is, if the target accounts are long, their own accounts will be short immediately, and the target accounts will be short immediately.