Above100Day = C >= MA(C,100);
Buy = inwatchlist(1)==1; //not work
AddToComposite(Above100Day, "~HSI_100DayMA", "X" );
AddToComposite( 1, "~HSI_100DayMA", "I" );
//Advanced-declined line
AddToComposite(C>Ref(C,-1),"~Adv_HSI","X");
AddToComposite(C<Ref(C,-1),"~Dec_HSI","X");
AddToComposite(C==Ref(C,-1),"~NC_HSI","X");
Buy = inwatchlist(1)==1 do not work, any suggestions can provide ?