指標不會顯示的問題

想請這個布林線指標為何只有日線，週線，月線才會顯示，用60分鐘或更小的時區不會顯示

input: 

Length(52, "天數"), 

UpperBand(2, "up_bar"), 

LowerBand(2, "low_bar"); 

variable: MA(0.0), up(0.0), down(0.0), Price_1(0.0);

Price_1 = Close;

up = bollingerband(Price_1, Length, UpperBand);

down = bollingerband(Price_1, Length, -1 * LowerBand);

MA = (up+down)/2.0;

Plot1(up,"BB_UP");

Plot2(down,"BB_LO");

Plot3(MA,"BB_MA");