Of course, plastic tray has its advantages in some specific fields, such as medicine and food. Pallets are a means of keeping prices up, not falling with stocks. In the case of a bad situation with a large plate, the large single tray in a stock plate is to reduce the pressure of the plate.
Dalian plastic tray stock market is such that there is no true or false or right or wrong, tray is a way to attract retail investors to follow the trend of shipping, but the main force can also be reversed. Another common "tray" has obvious significance of protecting the market, which often appears in the situation of sharp unilateral decline of the market.