Improve? Bonn line? Buy blue and sell yellow? Future-free function

m 1:= 6； n 1:= 3；

Bonn line: (expma (close, m 1)+ma (close, m 1 * 2)+ma (close, m 1 * 4))/3, color ff 00ff, line thickness 2;

LC？ :=? REF (close,1);

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

Adhere to the line ((REF(RSI,1) >; =80? And then what? RSI & lt80), closing, opening, 1, 0), COLORYELLOW

Adhere to the line ((REF(RSI,1) <; =20? And then what? RSI & gt20), close, open, 2,0), COLORBLUE