CCI指标是什么意思？CCI指标使用技巧有哪些？

JA1:=(DVOL/C)/2;
A2:=SUM(IF(JA1>100 AND CLOSE>REF(CLOSE,1),JA1,0),0);
A3:=SUM(IF(JA1>100 AND CLOSE<REF(CLOSE,1),JA1,0),0);
A4:=SUM(IF(JA1<100 AND CLOSE>REF(CLOSE,1),JA1,0),0);
A5:=SUM(IF(JA1<100 AND CLOSE<REF(CLOSE,1),JA1,0),0);
A6:=A2 A3 A4 A5;
机买:=(A2/A6)*100;
机卖:=(A3/A6)*100;
主力差:=机买-机卖;
机构加仓:=(主力差>=REF(主力差,1) 1.5)*50 AND 机买>机卖;
机构抄底:=金叉 AND 机构加仓;
DRAWTEXT (机构抄底,L*0.97,'↖机构入驻'),COLORCYAN;
机构追买:=机构加仓 AND 追拉升;
DRAWTEXT (机构追买,L*0.97,'↖机构吃单'),COLORFF00FF;
{猎庄}