将金山银山中的买入做成选股公式

编写要求：

解答：

?网友求助：

DIFF:=EMA(CLOSE,12)-EMA(CLOSE,26);
DEA:=EMA(DIFF,9);
MA1:MA(CLOSE,8),colorFFFFFF;
MA2:MA(CLOSE,21),colorFFFF;
多头:STICKLINE(DIFF>DEA,CLOSE,OPEN,8,0),colorFF;
STICKLINE(DIFF>DEA,HIGH,LOW,0,0),colorFF;
空头:STICKLINE(DIFF<=DEA,CLOSE,OPEN,8,0),colorFFFF00;
STICKLINE(DIFF<=DEA,HIGH,LOW,0,0),colorFFFF00;
DRAWTEXT(CROSS(DIFF,DEA),LOW-0.2,'买入'),colorFF;
DRAWTEXT(CROSS(DEA,DIFF),HIGH+0.2,'卖出'),colorFF00;