趋势:=7*SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*30,4,1)
-3*SMA(SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*30,4,1),3,1)
-SMA(SMA(SMA((CLOSE-LLV(LOW,27))/(HHV(HIGH,27)-LLV(LOW,27))*30,4,1),3,1),2,1);
套利:=14;
CD:=crOSS(趋势,套利);
买入:FILTER(IF(CD,1,0),3);