X_1:=MA(CLOSE,20); X_2:=X_1-2*STD(CLOSE,20); X_3:=REF(CLOSE,1)<REF(X_2,1) AND REF(CLOSE,2)<REF(X_2,2); X_4:=CLOSE>OPEN; X_5:=X_3 AND X_4; XG:X_5 AND NOT(REF(X_5,1));
