见凌见的 K线微积分律

INPUT: SHORT(5,1,900),LONG(30,1,900);
DIF1: (LONG-SHORT)/2*EMA(EMA((C-REF(C,1)),SHORT),LONG);
DIF2: ((LONG-SHORT)/2)*EMA(EMA(C,SHORT)-REF(EMA(C,SHORT),1),LONG);
DIF3: EMA(C,SHORT)-EMA(C,LONG) ;