前几日的移动平均线，给合MACD及KDJ指标使用。
MA3X3:REF(MA(CLOSE,3),3);
MA7X5:REF(MA(CLOSE,7),5);
MA25X5:REF(MA(CLOSE,25),5),colorgreen,LINETHICK2;
引力线:(MA(CLOSE,30)+MA(CLOSE,72))/2,colorred,LINETHICK2;
MA12:MA(CLOSE,12),POINTDOT,LINETHICK4,colormagenta;
MA160:MA(CLOSE,160);
