Today's turnover = yesterday's turnover ×( 1+30%). The transaction volume and transaction amount are expressed by the following formula: transaction quantity (transaction volume) * transaction price = transaction amount (transaction volume). The formula is yesterday's turnover and the expression is as follows.

1, yesterday's turnover REF(VOL, 1).

2. Where the function is REF, indicating the meaning of the previous day.

3, such as yesterday's closing price REF (closing price, 1).