Johnny Dough's article, “Reversing MACD: The Sequel” presented additional formulas for getting the price required for the MACD to give a signal on the next bar. The article include code for an all-in-one indicator. The indicator prompted for the MACD time periods and whether to use simple or exponential moving averages. It then plotted the close required on the next bar for three different signals; 1) the MACD to equal zero, 2) the MACD to equal the value on the current bar, and 3) the MACD to cross it's signal line. The MetaStock code for that indicator is listed below:

x:= Input("short term MA periods",1,50,12);

y:= Input("long term MA periods",2,50,26);

z:= Input("signal line periods",1,50,9);

type:= Input("MA type < 1=EMA | 2=SMA >",1,2,1);

ax:= 2/(x+1);

ay:= 2/(y+1);

az:= 2/(z+1);

cmacd:= Mov(C,x,E) - Mov(C,y,E);

smacd:= Mov(C,x,S) - Mov(C,y,S);

peflat:= (ax*Mov(C,x,E) - ay*Mov(C,y,E))/(ax-ay);

peeq0:= ((1-ay)*Mov(C,y,E) - (1-ax)*Mov(C,x,E))/(ax-ay);

pesig:= (Mov(cmacd,z,E) - (1-ax)*Mov(C,x,E) + (1-ay)*Mov(C,y,E))/(ax-ay);

psflat:= (x*Ref(C,-Y+1) - y*Ref(C,-x+1))/(x-y);

pseq0:= (x*y*(Mov(C,x,S)-Mov(C,y,S))+x*Ref(C,-y+1)-y*Ref(C,-x+1))/(x-y);

pssig:= ((x*y*z - x*y)*smacd - x*y*z*Mov(smacd,z,S) -

(y*z - y)*Ref(C,-x+1) + (x*z-x)*Ref(C,-y+1) +

x*y * Ref(smacd,-z+1) )/(x*z-y*z-x+y);

If(type=1,peflat,psflat);

If(type=1,peeq0,pseq0);

If(type=1,pesig,pssig);