如何在SMA（20）内输出确切的收盘价和确切的布林线上限值，以计算该水平是否为直线？

Question

如何在SMA（20）内输出确切的收盘价和布林线的确切值，以计算该水平是否为直线？

TradingView Pine脚本编辑器。

SMA_length = input(20, title="SMA Length")
STDEV_length = input(20, title="STDEV Length")

sma = sma(close, SMA_length)
stdev = stdev(close, STDEV_length)

bb0 = sma - (stdev * 2)
bb5 = sma - (stdev * 1.8)
bb10 = sma - (stdev * 1.6)
bb15 = sma - (stdev * 1.4)
bb20 = sma - (stdev * 1.2)
bb25 = sma - (stdev)
bb75 = sma + (stdev)
bb100 = sma + (stdev * 2)

pSMA = plot(sma, "sma", color=#00ffff, transp=0)
pBB0 = plot(bb0, "bb0", color=#3399ff, transp=0)

pBB5 = plot(bb5, "bb5", color=#cc66ff, transp=5)
pBB10 = plot(bb10, "bb10", color=#cc66ff, transp=10)
pBB15 = plot(bb15, "bb15", color=#cc66ff, transp=15)
pBB20 = plot(bb20, "bb20", color=#cc66ff, transp=20)
pBB25 = plot(bb25, "bb25", color=#cc66ff, transp=25)
pBB75 = plot(bb75, "bb75", color=#cc66ff, transp=25)

pBB100 = plot(bb100, "bb100", color=#3399ff, transp=0)