pine-script - FOR LOOP，用于绘制 2 条具有特定公式的水平线

Question

对于循环问题，根据公式打印 2 条水平线。

当证券、价格/收盘价发生变化时，必须自动删除旧线路并按照上述公式替换为新线路

//@version=4
study("g", overlay=true)





float g_90 = 0
float g_90_1 = 0

for g_90 = 0 to 1000000                                                     // 1000000 can be any infinite number
    g_90_1          = g_90 + 1                                              // second variable is 1 value above previous variable g_90             
    g_90_return     = 4*(g_90*g_90) + 7*(g_90) + 4                          //assign a variable g_90_return; to the formula1 = 4*(g_90*g_90) + 7*(g_90) + 4  to plot a horizontal line
    g_90_1_return   = 4*(g_90_1*g_90_1) + 7*(g_90_1) + 4                    //assign a variable g_90_1_return; to the formula2 = 4*(g_90_1*g_90_1) + 7*(g_90_1) + 4  with second variable to plot another horizontal line

    if( (g_90_return < close) and ( g_90_1_return > close) )                // if close > formula1 and close < formula2, draw both the hroizontal lines; as long as price is contained within them
        hline(g_90_return   , color = color.blue, linewidth= 4)
        hline(g_90_1_return , color = color.blue,  linewidth= 4)
    else
        g_90 := g_90 + 1                                                    // run loop again with incremental value
    

Answer 1

hline()不能在for循环中使用。你可以使用line.new().