indicator don't draw after modify&compile

 

Hi,

I'm working on this indicator, no line, no object, it just draws some HISTOGRAMs. But when I modify the code then re-compile, the histograms disappear. With "data window" I can see data is OK, but just doesn't show on chart. So I have to delete this indicator from chart and drag&drop again, to make it show again.

On what cases does this happen?


 
joshatt: On what cases does this happen?
Only one case. Broken code.
 
Thanks for the help.