Technical index superposition is a common analysis method in Tianfu futures trading software, which can help traders to study and predict market trends more deeply. The specific operation is as follows:

1. Open Tianfu futures trading software and log in to the account.

2. In the trading software interface, find the K-line chart or time-sharing chart of the variety you want to superimpose technical indicators.

3. In the K-line chart or time-sharing chart interface, find or click the "indicator" or "technical indicator" option in the menu bar above.

4. In the indicator menu that pops up, select the technical indicator to be superimposed. Tianfu futures trading software usually provides a variety of commonly used technical indicators, such as moving average, MACD, relative strength index and so on.

5. After selecting the technical indicators, you can set the parameters of the indicators, such as the period of the moving average and the fast and slow line parameters of MACD. The specific parameter setting depends on your personal needs and trading strategy.

6. After setting the parameters, click OK or Apply, and the trading software will automatically display the selected technical indicators on the K-line chart or time-sharing chart.

7. According to the superimposed technical indicators, you can judge and analyze the market trend more accurately and help you make trading decisions.

It should be noted that due to different trading software, the specific superposition technical indicators may be different. The above are the general operation steps. The specific operation method can also refer to the manual of Tianfu futures trading software or consult customer service.