金蝉吐丝（简洁，有图,有用法,无未来）主图指标

M1:MA(CLOSE,17)+ABS(MA(CLOSE,17)-REF(MA(CLOSE,17),1)),COLORGREEN;

M2:MA(CLOSE,17)+MA(CLOSE,17)-REF(MA(CLOSE,17),1),COLORGREEN,LINETHICK1;

M3:IF(MA(CLOSE,17)<M2,M2,MA(CLOSE,17)),COLORGREEN,LINETHICK1;

支撑线:M3-(EMA(C,3)-M3),COLORFF8080,LINETHICK1;

J1:=BACKSET(M1>REF(M1,1),2);

IF(J1,M3,DRAWNULL),COLORRED,LINETHICK2;

DRAWICON(CROSS(支撑线,M3),H*1.01,2);

DRAWICON(CROSS(M3,支撑线),L*0.99,1);