标题：MACD金叉死叉问题

金叉后   记录A=1  

就是不会写   用IF 语句怎么写？

VARIABLE:A:=0;
input:p(26,20,100,8),s(12,5,40,4),m(9,2,60,6);
DIFF :EMA(CLOSE,S) - EMA(CLOSE,P);
DEA  :EMA(DIFF,M);
MACD1 :2*(DIFF-DEA), COLORSTICK;
macdjc:cross(diff,dea),NODRAW;//macd金叉
macdsc:cross(dea,diff),NODRAW;

IF macdjc THEN A:=1;
IF macdsc THEN A:=-1;