标题：15分钟周期公式编写

ma20:=stkindi('','ma.ma3',0,6);

ma20_1:=stkindi('','ma.ma3',0,6,-1);

ma5:=ma(c,5);

ma10:=ma(c,10);

if cross(ma5,ma10) and ma20>ma20_1 then begin

   sellshort(1,0,market);

   buy(holding=0,1,market);

end

if cross(ma10,ma5) and ma20<ma20_1 then begin

   sell(1,0,market);

   buyshort(holding=0,1,market);

end