input:
Length(20, "MA的天數"),
UpperBand(2, "上通道標準差倍數"),
LowerBand(2, "下通道標準差倍數");
variable: mid(0), up(0), down(0);
up = bollingerband(Close, Length, UpperBand);
mid = average(close, Length);
down = bollingerband(Close, Length, -1 * LowerBand);
plot1(up, "UB");
plot2(mid, "BBandMA");
plot3(down, "LB");
請問這樣是畫上下各1條的標準差
如果要畫成 上下 各2個標準差 要如何更改 謝謝
1 評論