tradingview轉xs

你好，我想要將tradingview的程式轉 xs，請問該如何轉換?

src = close

length=input(21)

obv(src) => cum(change(src) > 0 ? volume :change(src) <0 ? -volume : 0*volume)

os=obv(src)

obv_osc = (os - ema(os,length))

obv_color =obv_osc > 0 ? red:green

plot(obv_osc, color=obv_color, style =line ,title="OBV Points", linewidth=1)

plot(obv_osc, color=obv_color, transp=70 ,title="OBV", style=area)

圖繪變成以下的樣子