Inquire about the data of long and short positions through exchanges: Major domestic futures exchanges will publish the data of long and short positions of the day in official website after the settlement of each trading day.
After the close at around 5 pm every day, the online stock index futures positions will be updated. Through this data, retail investors can know the increase or decrease of positions of both long and short sides.
If the bulls significantly increase their positions, the market will rise the next day. On the contrary, if short positions increase significantly, the market will probably fall the next day.