Pine script Pine脚本中screener的自定义函数

我正在尝试将现有的开源screener转换为我自己的脚本

我的脚本中有这行代码，我想为它编写一个函数，可以扫描市场寻找可能的机会

color =
show_a ?
d_tc > d_bc and d_poi < p_poi ? color.white :
d_tc < d_bc and d_poi > p_poi ? color.white :
d_poi > d_bc ? color.green :
d_poi < d_bc ? color.red :
color.silver :
na

plot(d_poi, color = c_colo, title = "points")

golong=c_colo ==color.green
goshort=c_colo==color.red
alertcondition(golong, "Buy", " Buy Signal at {{exchange}}:{{ticker}}, Price = {{close}} at 
{{timenow}}")
alertcondition(goshort, "Sell", " Sell Signal at {{exchange}}:{{ticker}}, Price = {{close}} at 
{{timenow}}")

颜色=
秀给你看？
d_tc>d_bc和d_poip_poi？颜色。白色：
d_poi>d_bc？颜色。绿色：
d_poi

现在，我使用的自定义筛选程序来自Quant Nomad的链接

我希望当条件满足时，扫描仪将显示所有机会

color =
show_a ?
d_tc > d_bc and d_poi < p_poi ? color.white :
d_tc < d_bc and d_poi > p_poi ? color.white :
d_poi > d_bc ? color.green :
d_poi < d_bc ? color.red :
color.silver :
na

plot(d_poi, color = c_colo, title = "points")

golong=c_colo ==color.green
goshort=c_colo==color.red
alertcondition(golong, "Buy", " Buy Signal at {{exchange}}:{{ticker}}, Price = {{close}} at 
{{timenow}}")
alertcondition(goshort, "Sell", " Sell Signal at {{exchange}}:{{ticker}}, Price = {{close}} at 
{{timenow}}")

请帮忙