主题：金字塔为啥没有文华那个PUBU（瀑布线）指标？

PUBU(瀑布线)在金字塔里面竟然没有这个函数，奇怪，请问是怎么考虑？怎样才能把文华那个瀑布线指标用到金字塔上，请技术人员指教！

http://baike.baidu.com/view/933407.htm#2

input:P1(4,1,10,1),P2(6,1,10,1),P3(8,1,10,1),P4(11,1,30,1),P5(15,1,30,1),P6(19,1,30,1);
PB1:(ema(C,P1)+ma(C,2*P1)+ma(C,4*P1))/3;
PB2:(ema(C,P2)+ma(C,2*P2)+ma(C,4*P2))/3;
PB3:(ema(C,P3)+ma(C,2*P3)+ma(C,4*P3))/3;
PB4:(ema(C,P4)+ma(C,2*P4)+ma(C,4*P4))/3;
PB5:(ema(C,P5)+ma(C,2*P5)+ma(C,4*P5))/3;
PB6:(ema(C,P6)+ma(C,2*P6)+ma(C,4*P6))/3,COLORCYAN;