0轴下上拐买入，超载0轴下拐卖出。请按规则进行操作！

RSV:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
随:SMA(RSV,3,1); 机:SMA(随,3,1);
随机:3*随-2*机;  昨随机:REF(随机,1),colormagenta,NODRAW;
DRAWICON(CROSS(随机,0),75,1);DRAWICON(CROSS(随机,10),50,11);
DRAWICON(CROSS(随机,机),35,23);DRAWICON(CROSS(机,随机),机,2);
100,colorwhite,DOTLINE; 10,colorwhite,DOTLINE; 0,colorwhite,DOTLINE;
DRAWTEXT_FIX(C>0,0.02,0,0,'随机上穿零轴，符合---跌幅超10%、价在薛斯通道4之下---的二个条件，是炒短线契机。');