AI:=Security("c:\\Metastock Data\\indices & indicators\\market indicators\\X.NYSE-A",C);
DECI:=Security("c:\\Metastock Data\\indices & indicators\\market indicators\\X.NYSE-D",C);
A:=Abs(AI-DECI);
B:=Mov(A,25,S);
B;
just Make sure that the securities are in the proper folders