编写条件：
请老师做铁龙长线LON在0轴上并多头排列的选股公式编写方法：
LC := REF(CLOSE,1);
VID := SUM(vol,2)/(((HHV(HIGH,2)-LLV(LOW,2)))*100);
RC := (CLOSE-LC)*VID;
LONG := SUM(RC,0);
DIFF := SMA(LONG,10,1);
DEA := SMA(LONG,20,1);
LON := DIFF-DEA;
LONMA := MA(LON,10);
XG:LON>0 AND LON>LONMA;
