title: Why is the number missing?
body: <p>Why is the number missing?</p>
  <pre><code>//@version=4
  study(&quot;我的编号指标&quot;, shorttitle='My bianhao', overlay=true)
  
  y = 0
  
  for a =0  to 100
    y := a + 1
  
    l = label.new(bar_index[y],na)
  
    label.set_text(l, text = tostring(y))
    label.set_yloc(l, yloc.belowbar)
    label.set_style(l, label.style_none)
    label.set_textcolor(l, textcolor = color.white)
  </code></pre>
  <p><a href="https://i.stack.imgur.com/vQK4R.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vQK4R.png" alt="enter image description here" /></a></p>