通達信KDJ指標畫線源碼，沒難度。求幫寫，

RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100,LINETHICK2;

K:SMA(RSV,3,1),LINETHICK1;

D:SMA(K,3,1),LINETHICK2;

J:3*K-2*D,LINETHICK1,COLORRED;

變色:IF(BACKSET(K>50,K>50),K,DRAWNULL),LINETHICK2,COLORGREEN;