简单的箱体预测，默认5日与13日EMA的差值为趋势线。

佳奕趋势:EMA(EMA(C,5)-EMA(C,13),1),COLORFFFFFF,LINETHICK1;
R:=(HHV(EMA(EMA(C,5)-EMA(C,13),1),100)+ABS(LLV(EMA(EMA(C,5)-EMA(C,13),1),100)))/2;
佳奕大箱顶:R/4*4,colorgreen;
佳奕小箱顶:-R/4*3,COLORAAAA00;
佳奕参考线:0,colormagenta;
佳奕小箱底:R/4*3,COLORAAAA00;
佳奕大箱底:-R/4*4,colorgreen;