【通达信】（波段顶底）副图公式

天:99;
RSV:=(((CLOSE-LLV(LOW,20))/(HHV(HIGH,20)-LLV(LOW,20)))*100);
趋势:3*SMA(RSV,5,1)-2*SMA(SMA(RSV,5,1),3,1);
准备:IF(趋势<=10,36,0),COLORYELLOW;
买入:IF(CROSS(趋势,10),36,0),COLORRED;
DRAWTEXT(趋势<=10,40,'备'),COLORYELLOW;
DRAWTEXT(CROSS(趋势,10),38,'买入'),COLORRED;
DRAWTEXT(CROSS(趋势,99),99,'卖'),COLORGREEN;
DRAWICON(CROSS(趋势,99),99,2),COLORGREEN;