I don't quite understand your question. The lowest price change of rubber is 5 yuan/ton. For example, the current price is 14900 yuan, and the next price is 14905 yuan (up) or 14895 yuan (down). What you should ask is the profit and loss of 1 hand at the minimum price change.

Rubber futures 1 lot is 10 ton, so the corresponding minimum profit and loss change is 5 yuan * 10 ton =50 yuan.