Whether today or yesterday, the calculation method is the same, there is no difference.

LC := REF (closing price,1);

RSI$ 1:SMA(MAX(CLOSE-LC，0)，N 1， 1)/SMA(ABS(CLOSE-LC)，N 1， 1)* 100；

RSI$2:SMA(MAX(CLOSE-LC，0)，N2， 1)/SMA(ABS(CLOSE-LC)，N2， 1)* 100；

RSI$3:SMA(MAX(CLOSE-LC，0)，N3， 1)/SMA(ABS(CLOSE-LC)，N3， 1)* 100；

Translate into vernacular.

Rsi 1 equals to today's closing price minus the maximum value of yesterday's closing price and 0, and the moving average 1 minus the absolute value of yesterday's closing price minus the moving average 1.

Rsi2 is equal to the weighted moving average of n2 day 1 today's closing price minus the maximum closing price of yesterday and 0 minus the weighted moving average of n2 day 1 yesterday's closing price.

Rsi3 is equal to n3 days 1 weighted moving average of today's closing price minus the maximum value of yesterday's closing price and 0 of the absolute value of yesterday's closing price minus n3 days 1 weighted moving average.

Where n 1 equals 6.

N2 is equal to 12.

N3 equal to 24 is an adjustable parameter.